diff --git a/lib/ui/screens/call_screen.dart b/lib/ui/screens/call_screen.dart
index f285d8f..90fbd6d 100644
--- a/lib/ui/screens/call_screen.dart
+++ b/lib/ui/screens/call_screen.dart
@@ -436,34 +436,50 @@ class _CallScreenState extends SafeState<CallScreen> {
         mainAxisAlignment: MainAxisAlignment.center,
         children: <Widget>[
           // Toggle audio button
-          Expanded(
-            child: IconButton(
-              icon: Icon(isStreamingAudio && !isAudioMuted
-                  ? Icons.mic
-                  : Icons.mic_off),
-              onPressed: () => _toggleStreaming(false),
-            ),
+          _FooterButton(
+            onPressed: () => _toggleStreaming(false),
+            icon: Icon(
+                isStreamingAudio && !isAudioMuted ? Icons.mic : Icons.mic_off),
           ),
 
           // Hang up call
-          Expanded(
-            child: IconButton(
-              icon: Icon(Icons.phone, color: Colors.red),
-              onPressed: () => _leaveCall(),
-            ),
+          _FooterButton(
+            icon: Icon(Icons.phone, color: Colors.red),
+            onPressed: () => _leaveCall(),
           ),
 
           // Toggle video button
-          Expanded(
-            child: IconButton(
-              icon: Icon(isStreamingVideo && !isVideoMuted
-                  ? Icons.videocam
-                  : Icons.videocam_off),
-              onPressed: () => _toggleStreaming(true),
-            ),
+          _FooterButton(
+            icon: Icon(isStreamingVideo && !isVideoMuted
+                ? Icons.videocam
+                : Icons.videocam_off),
+            onPressed: () => _toggleStreaming(true),
           ),
         ],
       ),
     );
   }
 }
+
+class _FooterButton extends StatelessWidget {
+  final Function() onPressed;
+  final Widget icon;
+
+  const _FooterButton({
+    Key key,
+    @required this.onPressed,
+    @required this.icon,
+  })  : assert(onPressed != null),
+        assert(icon != null),
+        super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Expanded(
+      child: IconButton(
+        icon: icon,
+        onPressed: () => onPressed(),
+      ),
+    );
+  }
+}