diff --git a/tests/omni_lock/omni_lock_sim.c b/tests/omni_lock/omni_lock_sim.c
index 9d3d8bf..c6a5162 100644
--- a/tests/omni_lock/omni_lock_sim.c
+++ b/tests/omni_lock/omni_lock_sim.c
@@ -38,6 +38,11 @@ int hex2bin(uint8_t* buf, const char* src) {
   return length;
 }
 
+int ed25519_verify(const unsigned char* signature, const unsigned char* message,
+                   size_t message_len, const unsigned char* public_key) {
+  return 0;
+}
+
 UTEST(pubkey_hash, pass) {
   init_input(&g_setting);
   g_setting.flags = IdentityFlagsCkb;