diff --git a/lib/Pool.js b/lib/Pool.js
index f60a70e6..f1738ea4 100644
--- a/lib/Pool.js
+++ b/lib/Pool.js
@@ -304,7 +304,14 @@ class Pool extends EventEmitter {
     if (this._draining === true) {
       return
     }
-    const minShortfall = this._config.min - this._count
+    let minShortfall = this._config.min - this._count
+
+    if (minShortfall <= 0) {
+      const waiting = this._waitingClientsQueue.length
+      if (waiting > 0) {
+        minShortfall = Math.min(waiting, this._config.max - this._count)
+      }
+    }
     for (let i = 0; i < minShortfall; i++) {
       this._createResource()
     }