diff --git a/src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java b/src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java
index e212104120ab30c93e08b605938d579f893a0a20..6dd2a7e25d24917e8e00e9893369460f74d437b2 100644
--- a/src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java
@@ -160,7 +160,9 @@ public class RtpSessionActivity extends XmppActivity
         setSupportActionBar(binding.toolbar);
 
         binding.dialpad.setClickConsumer(tag -> {
-            requireRtpConnection().applyDtmfTone(tag);
+            final JingleRtpConnection connection =
+                this.rtpConnectionReference != null ? this.rtpConnectionReference.get() : null;
+            if (connection != null) connection.applyDtmfTone(tag);
         });
 
         if (savedInstanceState != null) {