diff --git a/legacy/ethumb/src/lib/Ethumb.h b/legacy/ethumb/src/lib/Ethumb.h
index 96e7d0755a..236ddead4c 100644
--- a/legacy/ethumb/src/lib/Ethumb.h
+++ b/legacy/ethumb/src/lib/Ethumb.h
@@ -11,27 +11,21 @@
 # ifdef EFL_ETHUMB_BUILD
 #  ifdef DLL_EXPORT
 #   define EAPI __declspec(dllexport)
-#   define GNUC_NULL_TERMINATED
 #  else
 #   define EAPI
-#   define GNUC_NULL_TERMINATED
 #  endif /* ! DLL_EXPORT */
 # else
 #  define EAPI __declspec(dllimport)
-#  define GNUC_NULL_TERMINATED
 # endif /* ! EFL_ETHUMB_BUILD */
 #else
 # ifdef __GNUC__
 #  if __GNUC__ >= 4
 #   define EAPI __attribute__ ((visibility("default")))
-#   define GNUC_NULL_TERMINATED __attribute__((__sentinel__))
 #  else
 #   define EAPI
-#  define GNUC_NULL_TERMINATED
 #  endif
 # else
 #  define EAPI
-#  define GNUC_NULL_TERMINATED
 # endif
 #endif /* ! _WIN32 */
 
diff --git a/legacy/ethumb/src/lib/client/Ethumb_Client.h b/legacy/ethumb/src/lib/client/Ethumb_Client.h
index 42538fa095..fd3891ac6b 100644
--- a/legacy/ethumb/src/lib/client/Ethumb_Client.h
+++ b/legacy/ethumb/src/lib/client/Ethumb_Client.h
@@ -13,27 +13,21 @@
 # ifdef EFL_ETHUMB_CLIENT_BUILD
 #  ifdef DLL_EXPORT
 #   define EAPI __declspec(dllexport)
-#   define GNUC_NULL_TERMINATED
 #  else
 #   define EAPI
-#   define GNUC_NULL_TERMINATED
 #  endif /* ! DLL_EXPORT */
 # else
 #  define EAPI __declspec(dllimport)
-#  define GNUC_NULL_TERMINATED
 # endif /* ! EFL_ETHUMB_CLIENT_BUILD */
 #else
 # ifdef __GNUC__
 #  if __GNUC__ >= 4
 #   define EAPI __attribute__ ((visibility("default")))
-#   define GNUC_NULL_TERMINATED __attribute__((__sentinel__))
 #  else
 #   define EAPI
-#  define GNUC_NULL_TERMINATED
 #  endif
 # else
 #  define EAPI
-#  define GNUC_NULL_TERMINATED
 # endif
 #endif /* ! _WIN32 */