diff --git a/include/internal/cef_export.h b/include/internal/cef_export.h
index 2813253b6..3484293ae 100644
--- a/include/internal/cef_export.h
+++ b/include/internal/cef_export.h
@@ -43,13 +43,17 @@
 #else
 #define CEF_EXPORT
 #endif
-#define CEF_CALLBACK __stdcall
 
 #elif defined(COMPILER_GCC)
 
 #define CEF_EXPORT __attribute__ ((visibility("default")))
-#define CEF_CALLBACK
 
 #endif  // COMPILER_GCC
 
+#if defined(OS_WIN)
+#define CEF_CALLBACK __stdcall
+#else
+#define CEF_CALLBACK
+#endif
+
 #endif  // CEF_INCLUDE_INTERNAL_CEF_EXPORT_H_