diff --git a/client/cmdhfmf.c b/client/cmdhfmf.c
index c8ee0013c..24296b31d 100644
--- a/client/cmdhfmf.c
+++ b/client/cmdhfmf.c
@@ -1279,7 +1279,7 @@ static int CmdHF14AMfNested(const char *Cmd) {
     }
 
     // check if tag doesn't have static nonce
-    if (detect_classic_static_nonce() != 0) {
+    if (detect_classic_static_nonce() == 1) {
         PrintAndLogEx(WARNING, "Static nonce detected. Quitting...");
         PrintAndLogEx(INFO, "\t Try use " _YELLOW_("`hf mf staticnested`"));
         return PM3_EOPABORTED;
@@ -1839,7 +1839,7 @@ static int CmdHF14AMfNestedHard(const char *Cmd) {
     if (!know_target_key && nonce_file_read == false) {
 
         // check if tag doesn't have static nonce
-        if (detect_classic_static_nonce() != 0) {
+        if (detect_classic_static_nonce() == 1) {
             PrintAndLogEx(WARNING, "Static nonce detected. Quitting...");
             PrintAndLogEx(INFO, "\t Try use `" _YELLOW_("hf mf staticnested") "`");
             return PM3_EOPABORTED;
diff --git a/client/cmdhfmfhard.c b/client/cmdhfmfhard.c
index 32afd8cf2..90f686b80 100644
--- a/client/cmdhfmfhard.c
+++ b/client/cmdhfmfhard.c
@@ -1845,7 +1845,6 @@ static bool TestIfKeyExists(uint64_t key) {
             num_keys_tested += count;
             hardnested_print_progress(num_acquired_nonces, "(Test: Key found)", 0.0, 0);
             crypto1_destroy(pcs);
-            pthread_mutex_destroy(&statelist_cache_mutex);
             return true;
         }
     }
@@ -1853,7 +1852,6 @@ static bool TestIfKeyExists(uint64_t key) {
     num_keys_tested += count;
     hardnested_print_progress(num_acquired_nonces, "(Test: Key NOT found)", 0.0, 0);
     crypto1_destroy(pcs);
-    pthread_mutex_destroy(&statelist_cache_mutex);
     return false;
 }