diff --git a/lib/cmock_generator_plugin_callback.rb b/lib/cmock_generator_plugin_callback.rb
index 76593f0..d4d1bd3 100644
--- a/lib/cmock_generator_plugin_callback.rb
+++ b/lib/cmock_generator_plugin_callback.rb
@@ -82,7 +82,9 @@ class CMockGeneratorPluginCallback
 
   def mock_verify(function)
     func_name = function[:name]
-    "  if (Mock.#{func_name}_CallbackFunctionPointer != NULL)\n    call_instance = CMOCK_GUTS_NONE;\n"
+    "  if (Mock.#{func_name}_CallbackFunctionPointer != NULL)\n  {\n" \
+    "    call_instance = CMOCK_GUTS_NONE;\n" \
+    "    (void)call_instance;\n  }\n"
   end
 
 end