diff --git a/lib/connection-pool.js b/lib/connection-pool.js
index 13dfaf9..ba169da 100755
--- a/lib/connection-pool.js
+++ b/lib/connection-pool.js
@@ -211,6 +211,7 @@ function setUsed(pooled, waiter) {
         clearTimeout(waiter.timeout);
         waiter.timeout = undefined;
     }
+    this.log('acquired connection ' + pooled.id);
     waiter.callback(null, pooled.con);
 }