diff --git a/src/corelib/kernel/qjnitypes_impl.h b/src/corelib/kernel/qjnitypes_impl.h
index a7a3a30b2a..97be4f4394 100644
--- a/src/corelib/kernel/qjnitypes_impl.h
+++ b/src/corelib/kernel/qjnitypes_impl.h
@@ -243,6 +243,13 @@ static constexpr bool isPrimitiveType()
     return typeSignature<T>().size() == 2;
 }
 
+template<typename T>
+static constexpr bool isArrayType()
+{
+    constexpr auto signature = typeSignature<T>();
+    return signature.startsWith('[') && signature.size() > 2;
+}
+
 template<typename T>
 static constexpr bool isObjectType()
 {
@@ -250,18 +257,10 @@ static constexpr bool isObjectType()
         return true;
     } else {
         constexpr auto signature = typeSignature<T>();
-        return (signature.startsWith('L') || signature.startsWith('['))
-             && signature.endsWith(';');
+        return (signature.startsWith('L') && signature.endsWith(';')) || isArrayType<T>();
     }
 }
 
-template<typename T>
-static constexpr bool isArrayType()
-{
-    constexpr auto signature = typeSignature<T>();
-    return signature.startsWith('[');
-}
-
 template<typename T>
 static constexpr void assertObjectType()
 {