diff --git a/core/src/main/java/io/smallrye/openapi/runtime/scanner/spi/AbstractAnnotationScanner.java b/core/src/main/java/io/smallrye/openapi/runtime/scanner/spi/AbstractAnnotationScanner.java
index d196f91cf..c41b4873f 100644
--- a/core/src/main/java/io/smallrye/openapi/runtime/scanner/spi/AbstractAnnotationScanner.java
+++ b/core/src/main/java/io/smallrye/openapi/runtime/scanner/spi/AbstractAnnotationScanner.java
@@ -6,6 +6,9 @@
 import java.util.Set;
 
 import org.eclipse.microprofile.openapi.models.Extensible;
+import org.jboss.jandex.DotName;
+import org.jboss.jandex.MethodInfo;
+import org.jboss.jandex.Type;
 
 import io.smallrye.openapi.api.OpenApiConfig;
 import io.smallrye.openapi.api.constants.OpenApiConstants;
@@ -99,4 +102,20 @@ private static boolean profileIncluded(OpenApiConfig config, Set<String> profile
 
         return config.getScanProfiles().stream().anyMatch(profiles::contains);
     }
+
+    protected String[] getDefaultConsumes(AnnotationScannerContext context, MethodInfo methodInfo) {
+        if (methodInfo.returnType().kind().equals(Type.Kind.PRIMITIVE)
+                || methodInfo.returnType().name().equals(DotName.createSimple(String.class))) {
+            return OpenApiConstants.DEFAULT_MEDIA_TYPES.get();
+        }
+        return context.getConfig().getDefaultConsumes().orElseGet(OpenApiConstants.DEFAULT_MEDIA_TYPES);
+    }
+
+    protected String[] getDefaultProduces(AnnotationScannerContext context, MethodInfo methodInfo) {
+        if (methodInfo.returnType().kind().equals(Type.Kind.PRIMITIVE)
+                || methodInfo.returnType().name().equals(DotName.createSimple(String.class))) {
+            return OpenApiConstants.DEFAULT_MEDIA_TYPES.get();
+        }
+        return context.getConfig().getDefaultProduces().orElseGet(OpenApiConstants.DEFAULT_MEDIA_TYPES);
+    }
 }
diff --git a/extension-jaxrs/src/main/java/io/smallrye/openapi/jaxrs/JaxRsAnnotationScanner.java b/extension-jaxrs/src/main/java/io/smallrye/openapi/jaxrs/JaxRsAnnotationScanner.java
index af0d458d5..f01d8e9cb 100644
--- a/extension-jaxrs/src/main/java/io/smallrye/openapi/jaxrs/JaxRsAnnotationScanner.java
+++ b/extension-jaxrs/src/main/java/io/smallrye/openapi/jaxrs/JaxRsAnnotationScanner.java
@@ -438,10 +438,10 @@ private void processResourceMethod(final AnnotationScannerContext context,
         JaxRsLogging.log.processingMethod(method.toString());
 
         // Figure out the current @Produces and @Consumes (if any)
-        String[] defaultConsumes = context.getConfig().getDefaultConsumes().orElseGet(OpenApiConstants.DEFAULT_MEDIA_TYPES);
+        String[] defaultConsumes = getDefaultConsumes(context, method);
         context.setCurrentConsumes(getMediaTypes(context, method, JaxRsConstants.CONSUMES, defaultConsumes));
 
-        String[] defaultProduces = context.getConfig().getDefaultProduces().orElseGet(OpenApiConstants.DEFAULT_MEDIA_TYPES);
+        String[] defaultProduces = getDefaultProduces(context, method);
         context.setCurrentProduces(getMediaTypes(context, method, JaxRsConstants.PRODUCES, defaultProduces));
 
         // Process any @Operation annotation
diff --git a/extension-spring/src/main/java/io/smallrye/openapi/spring/SpringAnnotationScanner.java b/extension-spring/src/main/java/io/smallrye/openapi/spring/SpringAnnotationScanner.java
index 31fb8c4c9..3de75efc9 100644
--- a/extension-spring/src/main/java/io/smallrye/openapi/spring/SpringAnnotationScanner.java
+++ b/extension-spring/src/main/java/io/smallrye/openapi/spring/SpringAnnotationScanner.java
@@ -289,11 +289,11 @@ private void processControllerMethod(final AnnotationScannerContext context,
         SpringLogging.log.processingMethod(method.toString());
 
         // Figure out the current @Produces and @Consumes (if any)
-        context.setCurrentConsumes(getMediaTypes(method, SpringConstants.MAPPING_CONSUMES,
-                context.getConfig().getDefaultConsumes().orElse(OpenApiConstants.DEFAULT_MEDIA_TYPES.get())).orElse(null));
+        String[] defaultConsumes = getDefaultConsumes(context, method);
+        context.setCurrentConsumes(getMediaTypes(method, SpringConstants.MAPPING_CONSUMES, defaultConsumes).orElse(null));
 
-        context.setCurrentProduces(getMediaTypes(method, SpringConstants.MAPPING_PRODUCES,
-                context.getConfig().getDefaultProduces().orElse(OpenApiConstants.DEFAULT_MEDIA_TYPES.get())).orElse(null));
+        String[] defaultProduces = getDefaultProduces(context, method);
+        context.setCurrentProduces(getMediaTypes(method, SpringConstants.MAPPING_PRODUCES, defaultProduces).orElse(null));
 
         // Process any @Operation annotation
         Optional<Operation> maybeOperation = processOperation(context, resourceClass, method);
diff --git a/extension-vertx/src/main/java/io/smallrye/openapi/vertx/VertxAnnotationScanner.java b/extension-vertx/src/main/java/io/smallrye/openapi/vertx/VertxAnnotationScanner.java
index d061c6756..885b4ad32 100644
--- a/extension-vertx/src/main/java/io/smallrye/openapi/vertx/VertxAnnotationScanner.java
+++ b/extension-vertx/src/main/java/io/smallrye/openapi/vertx/VertxAnnotationScanner.java
@@ -233,10 +233,12 @@ private void processRouteMethod(final AnnotationScannerContext context,
         VertxLogging.log.processingMethod(method.toString());
 
         // Figure out the current @Produces and @Consumes (if any)
+        String[] defaultConsumes = getDefaultConsumes(context, method);
         context.setCurrentConsumes(getMediaTypes(method, VertxConstants.ROUTE_CONSUMES,
-                context.getConfig().getDefaultConsumes().orElse(OpenApiConstants.DEFAULT_MEDIA_TYPES.get())).orElse(null));
+                defaultConsumes).orElse(null));
+        String[] defaultProduces = getDefaultProduces(context, method);
         context.setCurrentProduces(getMediaTypes(method, VertxConstants.ROUTE_PRODUCES,
-                context.getConfig().getDefaultProduces().orElse(OpenApiConstants.DEFAULT_MEDIA_TYPES.get())).orElse(null));
+                defaultProduces).orElse(null));
 
         // Process any @Operation annotation
         Optional<Operation> maybeOperation = processOperation(context, resourceClass, method);