diff --git a/src/lib/ecore_cocoa/Ecore_Cocoa.h b/src/lib/ecore_cocoa/Ecore_Cocoa.h
index 27ae045a38..106b34788a 100644
--- a/src/lib/ecore_cocoa/Ecore_Cocoa.h
+++ b/src/lib/ecore_cocoa/Ecore_Cocoa.h
@@ -43,7 +43,9 @@ extern "C" {
  * @typedef Ecore_Cocoa_Window
  * Opaque handler to manipulate a Cocoa Window through Ecore
  */
+#ifndef _ECORE_COCOA_WINDOW_PREDEF
 typedef struct _Ecore_Cocoa_Window Ecore_Cocoa_Window;
+#endif /* ! _ECORE_COCOA_WINDOW_PREDEF */
 
 /**
  * @typedef Ecore_Cocoa_Screen
diff --git a/src/lib/ecore_evas/Ecore_Evas_Types.h b/src/lib/ecore_evas/Ecore_Evas_Types.h
index eea8aa741c..08d6d582d0 100644
--- a/src/lib/ecore_evas/Ecore_Evas_Types.h
+++ b/src/lib/ecore_evas/Ecore_Evas_Types.h
@@ -33,6 +33,7 @@ typedef struct _Ecore_WinCE_Window Ecore_WinCE_Window;
 #endif
 
 #ifndef __ECORE_COCOA_H__
+# define _ECORE_COCOA_WINDOW_PREDEF
 typedef struct _Ecore_Cocoa_Window Ecore_Cocoa_Window;
 #endif