diff --git a/error-prone-contrib/src/main/java/tech/picnic/errorprone/bugpatterns/ClassCastLambdaUsage.java b/error-prone-contrib/src/main/java/tech/picnic/errorprone/bugpatterns/ClassCastLambdaUsage.java
index 11af5823db..ce83ed0bda 100644
--- a/error-prone-contrib/src/main/java/tech/picnic/errorprone/bugpatterns/ClassCastLambdaUsage.java
+++ b/error-prone-contrib/src/main/java/tech/picnic/errorprone/bugpatterns/ClassCastLambdaUsage.java
@@ -48,7 +48,7 @@ public Description matchLambdaExpression(LambdaExpressionTree tree, VisitorState
     }
 
     Type type = ASTHelpers.getType(typeCast);
-    if (type == null || type.isParameterized()) {
+    if (type == null || type.isParameterized() || type.isPrimitive()) {
       return Description.NO_MATCH;
     }
 
diff --git a/error-prone-contrib/src/test/java/tech/picnic/errorprone/bugpatterns/ClassCastLambdaUsageTest.java b/error-prone-contrib/src/test/java/tech/picnic/errorprone/bugpatterns/ClassCastLambdaUsageTest.java
index 5b445ecacf..5e210d47c8 100644
--- a/error-prone-contrib/src/test/java/tech/picnic/errorprone/bugpatterns/ClassCastLambdaUsageTest.java
+++ b/error-prone-contrib/src/test/java/tech/picnic/errorprone/bugpatterns/ClassCastLambdaUsageTest.java
@@ -12,6 +12,7 @@ void identification() {
         .addSourceLines(
             "A.java",
             "import com.google.common.collect.ImmutableSet;",
+            "import java.util.stream.IntStream;",
             "import java.util.stream.Stream;",
             "",
             "class A {",
@@ -34,6 +35,7 @@ void identification() {
             "    Stream.<ImmutableSet>of(ImmutableSet.of(5)).map(l -> (ImmutableSet<Number>) l);",
             "    Stream.of(ImmutableSet.of(6)).map(l -> (ImmutableSet<?>) l);",
             "    Stream.of(7).reduce((a, b) -> (Integer) a);",
+            "    IntStream.of(8).mapToObj(a -> (char) a);",
             "",
             "    // BUG: Diagnostic contains:",
             "    Stream.of(8).map(i -> (Integer) i);",