diff --git a/src/psc/model/mcptt-pusher.cc b/src/psc/model/mcptt-pusher.cc
index 27cfafa8d..2ab0fc691 100644
--- a/src/psc/model/mcptt-pusher.cc
+++ b/src/psc/model/mcptt-pusher.cc
@@ -145,13 +145,15 @@ void
 McpttPusher::Release()
 {
     NS_LOG_FUNCTION(this);
-    NS_ABORT_MSG_UNLESS(m_pttApp, "There is no PTT app.");
-    NS_LOG_LOGIC("Pusher about to release PTT button.");
     SetPushing(false);
-    m_pttApp->TakeReleaseNotification();
-    if (m_automatic)
+    if (m_pttApp)
     {
-        SchedulePush();
+        NS_LOG_LOGIC("Pusher about to release PTT button.");
+        m_pttApp->TakeReleaseNotification();
+        if (m_automatic)
+        {
+            SchedulePush();
+        }
     }
 }