diff --git a/src/common/tuklib_common.h b/src/common/tuklib_common.h
index b1f531ea..8942e625 100644
--- a/src/common/tuklib_common.h
+++ b/src/common/tuklib_common.h
@@ -68,4 +68,11 @@
 #	define TUKLIB_DOSLIKE 1
 #endif
 
+// Clang has a macro to check if the compiler supports a certain warning.
+// If this macro is used with a compiler that does not support this macro
+// (like gcc), then it will cause a preprocessor error.
+#ifndef __has_warning
+#	define __has_warning(warn) 0
+#endif
+
 #endif