diff --git a/src/Dblayeroo.php b/src/Dblayeroo.php
index 6b813c4..f0e5154 100644
--- a/src/Dblayeroo.php
+++ b/src/Dblayeroo.php
@@ -3683,7 +3683,7 @@ class Dblayeroo
                         }
                     }
                     if ($autoInc !== null) {
-                        $autoInc = $this->table . "_${col}_seq";
+                        $autoInc = $this->table . "_{$col}_seq";
                     }
                 }
                 $this->debugLog(