diff --git a/boot/bootutil/src/image_validate.c b/boot/bootutil/src/image_validate.c
index 3f0550b..5b2b9a0 100644
--- a/boot/bootutil/src/image_validate.c
+++ b/boot/bootutil/src/image_validate.c
@@ -119,7 +119,7 @@
     const struct bootutil_key *key;
     uint8_t hash[32];
 
-    assert(keyhash_len == 32);
+    assert(keyhash_len <= 32);
 
     for (i = 0; i < bootutil_key_cnt; i++) {
         key = &bootutil_keys[i];