diff --git a/templates/common/callbacks.h b/templates/common/callbacks.h
index ec88c7f..d48e47b 100644
--- a/templates/common/callbacks.h
+++ b/templates/common/callbacks.h
@@ -1,7 +1,7 @@
 #ifndef TIBIA_CALLBACKS_H
 #define TIBIA_CALLBACKS_H
 
-#include <inttypes.h>
+#include <stddef.h>
 
 typedef struct {
 	void       *handle;