diff --git a/libs/tk/ztk/config.h b/libs/tk/ztk/config.h
index 86e48cac39..80782e2b96 100644
--- a/libs/tk/ztk/config.h
+++ b/libs/tk/ztk/config.h
@@ -13,6 +13,4 @@
 /* defines how to decorate public symbols while building */
 #ifdef _MSC_VER
 #define _ATK_EXTERN __declspec (dllexport) extern
-#else
-#define _ATK_EXTERN __attribute__((visibility("default"))) __declspec (dllexport) extern
 #endif