diff --git a/spring-web/src/main/java/org/springframework/http/converter/AbstractKotlinSerializationHttpMessageConverter.java b/spring-web/src/main/java/org/springframework/http/converter/AbstractKotlinSerializationHttpMessageConverter.java
index 8f047499e0f6..c4e7a4909dbd 100644
--- a/spring-web/src/main/java/org/springframework/http/converter/AbstractKotlinSerializationHttpMessageConverter.java
+++ b/spring-web/src/main/java/org/springframework/http/converter/AbstractKotlinSerializationHttpMessageConverter.java
@@ -152,7 +152,7 @@ private KSerializer<Object> serializer(Type type) {
 		KSerializer<Object> serializer = serializerCache.get(type);
 		if (serializer == null) {
 			try {
-				serializer = SerializersKt.serializerOrNull(type);
+				serializer = serializerInternal(type);
 			}
 			catch (IllegalArgumentException ignored) {
 			}
@@ -166,6 +166,12 @@ private KSerializer<Object> serializer(Type type) {
 		return serializer;
 	}
 
+	/**
+	 * An abstract method that returns a KSerializer over the given type.
+	 */
+	@Nullable
+	protected abstract KSerializer<Object> serializerInternal(Type type) throws IllegalArgumentException;
+
 	private boolean hasPolymorphism(SerialDescriptor descriptor, Set<String> alreadyProcessed) {
 		alreadyProcessed.add(descriptor.getSerialName());
 		if (descriptor.getKind().equals(PolymorphicKind.OPEN.INSTANCE)) {
diff --git a/spring-web/src/main/java/org/springframework/http/converter/KotlinSerializationBinaryHttpMessageConverter.java b/spring-web/src/main/java/org/springframework/http/converter/KotlinSerializationBinaryHttpMessageConverter.java
index bc094e9fe4b2..fde7ca5c2293 100644
--- a/spring-web/src/main/java/org/springframework/http/converter/KotlinSerializationBinaryHttpMessageConverter.java
+++ b/spring-web/src/main/java/org/springframework/http/converter/KotlinSerializationBinaryHttpMessageConverter.java
@@ -17,11 +17,13 @@
 package org.springframework.http.converter;
 
 import java.io.IOException;
+import java.lang.reflect.Type;
 
 import kotlinx.serialization.BinaryFormat;
 import kotlinx.serialization.KSerializer;
 import kotlinx.serialization.SerializationException;
 
+import kotlinx.serialization.SerializersKt;
 import org.springframework.http.HttpInputMessage;
 import org.springframework.http.HttpOutputMessage;
 import org.springframework.http.MediaType;
@@ -76,4 +78,9 @@ protected void writeInternal(Object object, KSerializer<Object> serializer, T fo
 			throw new HttpMessageNotWritableException("Could not write " + format + ": " + ex.getMessage(), ex);
 		}
 	}
+
+	@Override
+	protected KSerializer<Object> serializerInternal(Type type) throws IllegalArgumentException {
+		return SerializersKt.serializerOrNull(type);
+	}
 }
diff --git a/spring-web/src/main/java/org/springframework/http/converter/json/KotlinSerializationJsonHttpMessageConverter.java b/spring-web/src/main/java/org/springframework/http/converter/json/KotlinSerializationJsonHttpMessageConverter.java
index bb47542d607a..a011ff594741 100644
--- a/spring-web/src/main/java/org/springframework/http/converter/json/KotlinSerializationJsonHttpMessageConverter.java
+++ b/spring-web/src/main/java/org/springframework/http/converter/json/KotlinSerializationJsonHttpMessageConverter.java
@@ -16,11 +16,15 @@
 
 package org.springframework.http.converter.json;
 
+import kotlinx.serialization.KSerializer;
+import kotlinx.serialization.SerializersKt;
 import kotlinx.serialization.json.Json;
 
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.KotlinSerializationStringHttpMessageConverter;
 
+import java.lang.reflect.Type;
+
 /**
  * Implementation of {@link org.springframework.http.converter.HttpMessageConverter}
  * that can read and write JSON using
@@ -53,4 +57,9 @@ public KotlinSerializationJsonHttpMessageConverter() {
 	public KotlinSerializationJsonHttpMessageConverter(Json json) {
 		super(json, MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));
 	}
+
+	@Override
+	protected KSerializer<Object> serializerInternal(Type type) throws IllegalArgumentException {
+		return SerializersKt.serializerOrNull(type);
+	}
 }