diff --git a/src/generic/timer.cpp b/src/generic/timer.cpp
index bffbfa37c0..a67016706f 100644
--- a/src/generic/timer.cpp
+++ b/src/generic/timer.cpp
@@ -190,7 +190,11 @@ void wxTimerScheduler::NotifyTimers()
                         QueueTimer(desc, now + desc->timer->GetInterval());
                 }
                 else
+                {
                     desc = m_timers;
+                    if (!desc)
+                        break;
+                }
             }
         }
     }