diff --git a/lib/test_static_keys.c b/lib/test_static_keys.c
index 81d81052eb8dc16c47f0d7b2f2f0b192f40d5d1d..c61b299e367ffac86450ac59c123d0925285b96c 100644
--- a/lib/test_static_keys.c
+++ b/lib/test_static_keys.c
@@ -70,7 +70,7 @@ static void invert_keys(struct test_key *keys, int size)
 	}
 }
 
-int verify_keys(struct test_key *keys, int size, bool invert)
+static int verify_keys(struct test_key *keys, int size, bool invert)
 {
 	int i;
 	bool ret, init;