diff --git a/src/corelib/global/qendian.h b/src/corelib/global/qendian.h
index c2028289a7e..4e9cd2e6e35 100644
--- a/src/corelib/global/qendian.h
+++ b/src/corelib/global/qendian.h
@@ -49,12 +49,6 @@
 
 QT_BEGIN_NAMESPACE
 
-#ifdef __has_builtin
-#  define QT_HAS_BUILTIN(x)     __has_builtin(x)
-#else
-#  define QT_HAS_BUILTIN(x)     0
-#endif
-
 /*
  * ENDIAN FUNCTIONS
 */