diff --git a/src/Pdox.php b/src/Pdox.php
index e90ce7f..fed3b49 100644
--- a/src/Pdox.php
+++ b/src/Pdox.php
@@ -969,7 +969,8 @@ public function repair()
      */
     public function transaction()
     {
-        if (!$this->transactionCount++) {
+        if (!$this->transactionCount) {
+            $this->transactionCount++;
             return $this->pdo->beginTransaction();
         }
 
@@ -982,7 +983,7 @@ public function transaction()
      */
     public function commit()
     {
-        if (!--$this->transactionCount) {
+        if ($this->transactionCount) {
             return $this->pdo->commit();
         }
 
@@ -994,8 +995,9 @@ public function commit()
      */
     public function rollBack()
     {
-        if (--$this->transactionCount) {
-            $this->pdo->exec('ROLLBACK TO trans' . ($this->transactionCount + 1));
+        if ($this->transactionCount) {
+            $this->pdo->exec('ROLLBACK TO trans' . $this->transactionCount);
+            $this->transactionCount--;
             return true;
         }