diff --git a/src/hsm/dkek.c b/src/hsm/dkek.c
index 153aa60..cd89c65 100644
--- a/src/hsm/dkek.c
+++ b/src/hsm/dkek.c
@@ -88,6 +88,7 @@ int dkek_kcv(uint8_t *kcv) { //kcv 8 bytes
     hash256(dkek+IV_SIZE, 32, hsh);
     release_dkek();
     memcpy(kcv, hsh, 8);
+    return HSM_OK;
 }
 
 int dkek_kenc(uint8_t *kenc) { //kenc 32 bytes