diff --git a/lib/Client.js b/lib/Client.js
index 7b5979b..4551d89 100644
--- a/lib/Client.js
+++ b/lib/Client.js
@@ -631,11 +631,18 @@ function pingCb(self) {
   self._handle.ping();
 }
 Client.prototype._ping = function() {
-  if (this._tmrInactive === undefined
+  if ((this._tmrInactive === undefined
       && typeof this._config.pingInactive === 'number'
+      && this._config.pingInactive > 0)
+      || (this._tmrInactive === undefined
       && typeof this._config.pingWaitRes === 'number'
-      && this._config.pingInactive > 0
-      && this._config.pingWaitRes > 0) {
+      && this._config.pingWaitRes > 0)) {
+    if (this._config.pingInactive === undefined) {
+      this._config.pingInactive = 60000;
+    }
+    if (this._config.pingWaitRes === undefined) {
+      this._config.pingWaitRes = 60000;
+    }
     this._tmrInactive = setTimeout(pingCb, this._config.pingInactive, this);
   }
 };