diff --git a/openapi-generator/src/main/java/io/micronaut/openapi/generator/Utils.java b/openapi-generator/src/main/java/io/micronaut/openapi/generator/Utils.java
index ff5ce2d08..4e8852ee9 100644
--- a/openapi-generator/src/main/java/io/micronaut/openapi/generator/Utils.java
+++ b/openapi-generator/src/main/java/io/micronaut/openapi/generator/Utils.java
@@ -105,6 +105,10 @@ public static Pair<CodegenParameter, Set<String>> processMultipartBody(CodegenOp
 
     public static void processGenericAnnotations(CodegenParameter parameter, boolean useBeanValidation, boolean isGenerateHardNullable,
                                                  boolean isNullable, boolean isRequired, boolean isReadonly, boolean withNullablePostfix) {
+        var ext = parameter.vendorExtensions;
+        if (!ext.containsKey("isPrimitiveArray")) {
+            ext.put("isPrimitiveArray", isJavaPrimitiveArray(parameter.dataType) || isKotlinPrimitiveArray(parameter.dataType));
+        }
         CodegenProperty items = parameter.isMap ? parameter.additionalProperties : parameter.items;
         String datatypeWithEnum = parameter.datatypeWithEnum == null ? parameter.dataType : parameter.datatypeWithEnum;
         processGenericAnnotations(parameter.dataType, datatypeWithEnum, parameter.isMap, parameter.containerTypeMapped,
@@ -113,10 +117,14 @@ public static void processGenericAnnotations(CodegenParameter parameter, boolean
 
     public static void processGenericAnnotations(CodegenProperty property, boolean useBeanValidation, boolean isGenerateHardNullable,
                                                  boolean isNullable, boolean isRequired, boolean isReadonly, boolean withNullablePostfix) {
+        var ext = property.vendorExtensions;
+        if (!ext.containsKey("isPrimitiveArray")) {
+            ext.put("isPrimitiveArray", isJavaPrimitiveArray(property.dataType) || isKotlinPrimitiveArray(property.dataType));
+        }
         CodegenProperty items = property.isMap ? property.additionalProperties : property.items;
         String datatypeWithEnum = property.datatypeWithEnum == null ? property.dataType : property.datatypeWithEnum;
         processGenericAnnotations(property.dataType, datatypeWithEnum, property.isMap, property.containerTypeMapped,
-            items, property.vendorExtensions, useBeanValidation, isGenerateHardNullable, isNullable, isRequired, isReadonly, withNullablePostfix);
+            items, ext, useBeanValidation, isGenerateHardNullable, isNullable, isRequired, isReadonly, withNullablePostfix);
     }
 
     public static void processGenericAnnotations(String dataType, String dataTypeWithEnum, boolean isMap, String containerType, CodegenProperty itemsProp, Map<String, Object> ext,
@@ -124,17 +132,17 @@ public static void processGenericAnnotations(String dataType, String dataTypeWit
                                                  boolean isRequired, boolean isReadonly,
                                                  boolean withNullablePostfix) {
         String genericAnnotations = null;
+        dataType = addAnnotationsToPrimitiveArray(dataType, isNullable, isRequired, isReadonly, isGenerateHardNullable);
+        dataTypeWithEnum = addAnnotationsToPrimitiveArray(dataTypeWithEnum, isNullable, isRequired, isReadonly, isGenerateHardNullable);
         var typeWithGenericAnnotations = dataType;
         var typeWithEnumWithGenericAnnotations = dataTypeWithEnum;
         if (useBeanValidation && itemsProp != null && dataType.contains("<")) {
+            genericAnnotations = genericAnnotations(itemsProp, isGenerateHardNullable);
+            processGenericAnnotations(itemsProp, useBeanValidation, isGenerateHardNullable, itemsProp.isNullable, itemsProp.required, itemsProp.isReadOnly, withNullablePostfix);
             if (isMap) {
-                genericAnnotations = genericAnnotations(itemsProp, isGenerateHardNullable);
-                processGenericAnnotations(itemsProp, useBeanValidation, isGenerateHardNullable, itemsProp.isNullable, itemsProp.required, itemsProp.isReadOnly, withNullablePostfix);
                 typeWithGenericAnnotations = "Map<String, " + genericAnnotations + itemsProp.vendorExtensions.get("typeWithGenericAnnotations") + ">";
                 typeWithEnumWithGenericAnnotations = "Map<String, " + genericAnnotations + itemsProp.vendorExtensions.get("typeWithEnumWithGenericAnnotations") + ">";
             } else if (containerType != null) {
-                genericAnnotations = genericAnnotations(itemsProp, isGenerateHardNullable);
-                processGenericAnnotations(itemsProp, useBeanValidation, isGenerateHardNullable, itemsProp.isNullable, itemsProp.required, itemsProp.isReadOnly, withNullablePostfix);
                 typeWithGenericAnnotations = containerType + "<" + genericAnnotations + itemsProp.vendorExtensions.get("typeWithGenericAnnotations") + ">";
                 typeWithEnumWithGenericAnnotations = containerType + "<" + genericAnnotations + itemsProp.vendorExtensions.get("typeWithEnumWithGenericAnnotations") + ">";
             }
@@ -146,10 +154,44 @@ public static void processGenericAnnotations(String dataType, String dataTypeWit
         ext.put("typeWithEnumWithGenericAnnotations", typeWithEnumWithGenericAnnotations + (isNullableType ? "?" : ""));
     }
 
+    private static String addAnnotationsToPrimitiveArray(String dataType, boolean isNullable, boolean isRequired, boolean isReadOnly, boolean isGenerateHardNullable) {
+        if (!isJavaPrimitiveArray(dataType)) {
+            return dataType;
+        }
+
+        var type = dataType.substring(0, dataType.indexOf('['));
+
+        if (isNullable || !isRequired || isReadOnly) {
+            if (isGenerateHardNullable) {
+                return type + " @Nullable(inherited = true) []";
+            } else {
+                return type + " @Nullable []";
+            }
+        } else {
+            return type + " @NotNull []";
+        }
+    }
+
+    private static boolean isJavaPrimitiveArray(String dataType) {
+        return switch (dataType) {
+            case "byte[]", "short[]", "int[]", "long[]", "boolean[]", "char[]", "float[]", "double[]" -> true;
+            default -> false;
+        };
+    }
+
+    private static boolean isKotlinPrimitiveArray(String dataType) {
+        return switch (dataType) {
+            case "ByteArray", "ShortArray", "IntArray", "LongArray", "BooleanArray", "CharArray", "FloatArray", "DoubleArray" -> true;
+            default -> false;
+        };
+    }
+
     private static String genericAnnotations(CodegenProperty prop, boolean isGenerateHardNullable) {
 
         var type = prop.openApiType == null ? null : prop.openApiType.toLowerCase();
 
+        var isPrimitiveArray = isJavaPrimitiveArray(prop.dataType) || isKotlinPrimitiveArray(prop.dataType);
+
         var result = new StringBuilder();
 
         if (prop.isModel) {
@@ -227,7 +269,7 @@ private static String genericAnnotations(CodegenProperty prop, boolean isGenerat
                 result.append(") ");
             }
         }
-        if (!(Boolean) prop.vendorExtensions.get("isPrimitive")) {
+        if (!isPrimitiveArray && !(Boolean) prop.vendorExtensions.get("isPrimitive")) {
             if (prop.isNullable) {
                 if (isGenerateHardNullable) {
                     result.append("@Nullable(inherited = true) ");
diff --git a/openapi-generator/src/main/resources/templates/java-micronaut/common/params/validation.mustache b/openapi-generator/src/main/resources/templates/java-micronaut/common/params/validation.mustache
index 28a219f64..5dcb7644c 100644
--- a/openapi-generator/src/main/resources/templates/java-micronaut/common/params/validation.mustache
+++ b/openapi-generator/src/main/resources/templates/java-micronaut/common/params/validation.mustache
@@ -1,4 +1,4 @@
-
+{{^vendorExtensions.isPrimitiveArray}}
 {{#isNullable}}
     {{#generateHardNullable}}
     @Nullable(inherited = true)
@@ -32,8 +32,10 @@
         {{/generateHardNullable}}
     {{/required}}
 {{/isNullable}}
+{{/vendorExtensions.isPrimitiveArray}}
 {{!All the validation}}
 {{#useBeanValidation}}
+    {{^vendorExtensions.isPrimitiveArray}}
     {{^isNullable}}
         {{#required}}
             {{^isReadOnly}}
@@ -41,6 +43,7 @@
             {{/isReadOnly}}
         {{/required}}
     {{/isNullable}}
+    {{/vendorExtensions.isPrimitiveArray}}
     {{!Validate all pojos and enums}}
     {{^isUuid}}
     {{^isContainer}}
diff --git a/openapi-generator/src/main/resources/templates/kotlin-micronaut/common/params/validation.mustache b/openapi-generator/src/main/resources/templates/kotlin-micronaut/common/params/validation.mustache
index 838d56baa..98bad087d 100644
--- a/openapi-generator/src/main/resources/templates/kotlin-micronaut/common/params/validation.mustache
+++ b/openapi-generator/src/main/resources/templates/kotlin-micronaut/common/params/validation.mustache
@@ -1,4 +1,5 @@
 
+{{^vendorExtensions.isPrimitiveArray}}
 {{#isNullable}}
     @Nullable
 {{/isNullable}}
@@ -12,8 +13,10 @@
     @Nullable
     {{/required}}
 {{/isNullable}}
+{{/vendorExtensions.isPrimitiveArray}}
 {{!All the validation}}
 {{#useBeanValidation}}
+    {{^vendorExtensions.isPrimitiveArray}}
     {{^isNullable}}
         {{#required}}
             {{^isReadOnly}}
@@ -21,6 +24,7 @@
             {{/isReadOnly}}
         {{/required}}
     {{/isNullable}}
+    {{/vendorExtensions.isPrimitiveArray}}
     {{!Validate all pojos and enums}}
     {{^isUuid}}
     {{^isContainer}}
diff --git a/openapi-generator/src/main/resources/templates/kotlin-micronaut/common/params/validation_field.mustache b/openapi-generator/src/main/resources/templates/kotlin-micronaut/common/params/validation_field.mustache
index 24555f6c2..93004d8c8 100644
--- a/openapi-generator/src/main/resources/templates/kotlin-micronaut/common/params/validation_field.mustache
+++ b/openapi-generator/src/main/resources/templates/kotlin-micronaut/common/params/validation_field.mustache
@@ -1,4 +1,5 @@
 
+{{^vendorExtensions.isPrimitiveArray}}
 {{#isNullable}}
     @{{{vendorExtensions.fieldAnnPrefix}}}Nullable
 {{/isNullable}}
@@ -12,8 +13,10 @@
     @{{{vendorExtensions.fieldAnnPrefix}}}Nullable
     {{/required}}
 {{/isNullable}}
+{{/vendorExtensions.isPrimitiveArray}}
 {{!All the validation}}
 {{#useBeanValidation}}
+    {{^vendorExtensions.isPrimitiveArray}}
     {{^isNullable}}
         {{#required}}
             {{^isReadOnly}}
@@ -21,6 +24,7 @@
             {{/isReadOnly}}
         {{/required}}
     {{/isNullable}}
+    {{/vendorExtensions.isPrimitiveArray}}
     {{!Validate all pojos and enums}}
     {{^isUuid}}
     {{^isContainer}}
diff --git a/openapi-generator/src/test/java/io/micronaut/openapi/generator/JavaMicronautClientCodegenTest.java b/openapi-generator/src/test/java/io/micronaut/openapi/generator/JavaMicronautClientCodegenTest.java
index 5f0627521..db5620b5b 100644
--- a/openapi-generator/src/test/java/io/micronaut/openapi/generator/JavaMicronautClientCodegenTest.java
+++ b/openapi-generator/src/test/java/io/micronaut/openapi/generator/JavaMicronautClientCodegenTest.java
@@ -782,7 +782,7 @@ Mono<HttpResponse<Void>> myOp(
                     @Produces("multipart/form-data")
                     Mono<HttpResponse<Void>> myOp_1(
                         @Nullable @Valid Coordinates coordinates,
-                        @Nullable byte[] file
+                        byte @Nullable [] file
                     );
                 """,
             """
diff --git a/openapi-generator/src/test/java/io/micronaut/openapi/generator/KotlinMicronautClientCodegenTest.java b/openapi-generator/src/test/java/io/micronaut/openapi/generator/KotlinMicronautClientCodegenTest.java
index c5a7c294f..5fbaf859e 100644
--- a/openapi-generator/src/test/java/io/micronaut/openapi/generator/KotlinMicronautClientCodegenTest.java
+++ b/openapi-generator/src/test/java/io/micronaut/openapi/generator/KotlinMicronautClientCodegenTest.java
@@ -857,7 +857,7 @@ fun myOp(
                     @Produces("multipart/form-data")
                     fun myOp_1(
                         @Nullable @Valid coordinates: Coordinates? = null,
-                        @Nullable file: ByteArray? = null,
+                        file: ByteArray? = null,
                     ): Mono<HttpResponse<Void>>
                 """,
             """