diff --git a/lib/odbc.js b/lib/odbc.js
index 8dec090c..331ac48f 100644
--- a/lib/odbc.js
+++ b/lib/odbc.js
@@ -1842,7 +1842,7 @@ Pool.prototype.open = function (connStr, callback)
   {
     // Move it to queue untill an existing connection is not closed.
     // Call it from db.close() version of pool.open and pool.init.
-    self.queue.push(function (next) {
+    function queueCallback(next) {
       if (self.availablePool[connStr] && self.availablePool[connStr].length)
       {
         db = self.availablePool[connStr].shift();
@@ -1851,7 +1851,11 @@ Pool.prototype.open = function (connStr, callback)
         self.usedPool[connStr].push(db);
         callback && callback(null, db);
       }
-    });
+      else {
+        self.queue.push(queueCallback);
+      }
+    }
+    self.queue.push(queueCallback);
   }
   else
   {