diff --git a/lib/tasks/dial.js b/lib/tasks/dial.js
index 8622bd4f..93b2595a 100644
--- a/lib/tasks/dial.js
+++ b/lib/tasks/dial.js
@@ -206,19 +206,21 @@ class TaskDial extends Task {
   _removeDtmfDetection(cs, ep) {
     if (ep) {
       delete ep.dtmfDetector;
-      ep.removeListener('dtmf', this._onDtmf.bind(this, cs, ep));
+      ep.removeAllListeners('dtmf');
     }
   }
 
   _onDtmf(cs, ep, evt) {
-    const match = ep.dtmfDetector.keyPress(evt.dtmf);
-    const requestor = ep.dtmfDetector === this.parentDtmfCollector ?
-      cs.requestor :
-      this.sd.requestor;
-    if (match) {
-      this.logger.debug(`parentCall triggered dtmf match: ${match}`);
-      requestor.request(this.dtmfHook, Object.assign({dtmf: match}, cs.callInfo))
-        .catch((err) => this.logger.info(err, 'Dial:_onDtmf - error'));
+    if (ep.dtmfDetector) {
+      const match = ep.dtmfDetector.keyPress(evt.dtmf);
+      const requestor = ep.dtmfDetector === this.parentDtmfCollector ?
+        cs.requestor :
+        this.sd.requestor;
+      if (match) {
+        this.logger.debug(`parentCall triggered dtmf match: ${match}`);
+        requestor.request(this.dtmfHook, Object.assign({dtmf: match}, cs.callInfo))
+          .catch((err) => this.logger.info(err, 'Dial:_onDtmf - error'));
+      }
     }
   }