diff --git a/src/wt/WGLWidget b/src/wt/WGLWidget
index dd39701..94634f7 100644
--- a/src/wt/WGLWidget
+++ b/src/wt/WGLWidget
@@ -798,7 +798,14 @@ public:
     SAMPLE_COVERAGE                = 0x80A0,
     
     /* ErrorCode */
+#ifdef _WIN32
+#pragma push_macro ("NO_ERROR")
+#undef NO_ERROR
+#endif
     NO_ERROR                       = 0x0,
+#ifdef _WIN32
+#pragma pop_macro ("NO_ERROR")
+#endif
     INVALID_ENUM                   = 0x0500,
     INVALID_VALUE                  = 0x0501,
     INVALID_OPERATION              = 0x0502,