diff --git a/lib/stackinit_kunit.c b/lib/stackinit_kunit.c
index c14c6f8e6308..c40818ec9c18 100644
--- a/lib/stackinit_kunit.c
+++ b/lib/stackinit_kunit.c
@@ -212,6 +212,7 @@ static noinline void test_ ## name (struct kunit *test)		\
 static noinline DO_NOTHING_TYPE_ ## which(var_type)		\
 do_nothing_ ## name(var_type *ptr)				\
 {								\
+	OPTIMIZER_HIDE_VAR(ptr);				\
 	/* Will always be true, but compiler doesn't know. */	\
 	if ((unsigned long)ptr > 0x2)				\
 		return DO_NOTHING_RETURN_ ## which(ptr);	\