diff --git a/tests/1-gdextension/my.c b/tests/1-gdextension/my.c
index 997cc1ad..e2b40eef 100644
--- a/tests/1-gdextension/my.c
+++ b/tests/1-gdextension/my.c
@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include <godot/gdextension_interface.h>
 
 #ifdef _WIN32