diff --git a/src/defs.h b/src/defs.h
index 0dcfde66..7c3bc1d5 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -59,6 +59,14 @@
 #   define __has_builtin(x) (0)
 #endif
 
+#ifndef __has_warning
+#   define __has_warning(x) (0)
+#endif
+
+#ifndef __has_include
+#   define __has_include(x) (0)
+#endif
+
 #if __has_feature(thread_sanitizer)
 #   define __SANITIZE_THREAD__ 1
 #endif