diff --git a/dlls/vcruntime140_1/except_x86_64.c b/dlls/vcruntime140_1/except_x86_64.c
index 039da37d598..f50847d886d 100644
--- a/dlls/vcruntime140_1/except_x86_64.c
+++ b/dlls/vcruntime140_1/except_x86_64.c
@@ -20,6 +20,7 @@
 
 #ifdef __x86_64__
 
+#include <stdarg.h>
 #include <stdlib.h>
 
 #include "wine/exception.h"