diff --git a/proto/debug/debug.h b/proto/debug/debug.h
index 11f6c5adddbee0b2d9f25585286da9f97e2f420a..c223d051b66028127b6893031ef58b05f366f1ac 100644
--- a/proto/debug/debug.h
+++ b/proto/debug/debug.h
@@ -1,6 +1,7 @@
 #pragma once
 #include <linux/kernel.h>
 #include <linux/printk.h>
+#include <linux/string.h>
 
 // This GCC extension removes the trailing comma when __VA_ARGS__ is empty. This
 // ensures the macro works whether or not extra arguments are provided.