diff --git a/spring-integration-http/src/main/java/org/springframework/integration/http/SerializingHttpMessageConverter.java b/spring-integration-http/src/main/java/org/springframework/integration/http/SerializingHttpMessageConverter.java
index 208fe71373..dafff9d283 100644
--- a/spring-integration-http/src/main/java/org/springframework/integration/http/SerializingHttpMessageConverter.java
+++ b/spring-integration-http/src/main/java/org/springframework/integration/http/SerializingHttpMessageConverter.java
@@ -45,7 +45,8 @@ public class SerializingHttpMessageConverter extends AbstractHttpMessageConverte
 
 	@Override
 	public boolean supports(Class<?> clazz) {
-		return Serializable.class.isAssignableFrom(clazz);
+		return !(byte[].class.equals(clazz)) && !(String.class.equals(clazz))
+				&& (clazz != null && Serializable.class.isAssignableFrom(clazz));
 	}
 
 	@Override