diff --git a/client/src/cmdhficlass.c b/client/src/cmdhficlass.c
index e2b9eae92..f30b54e95 100644
--- a/client/src/cmdhficlass.c
+++ b/client/src/cmdhficlass.c
@@ -3641,6 +3641,7 @@ static int CmdHFiClassEncode(const char *Cmd) {
             }
             if (keylen != 16) {
                 PrintAndLogEx(ERR, "Failed to load transport key from file");
+                free(enckeyptr);
                 return PM3_EINVARG;
             }
             memcpy(enc_key, enckeyptr, sizeof(enc_key));