diff --git a/ApplicationLibCode/Application/RiaGuiApplication.cpp b/ApplicationLibCode/Application/RiaGuiApplication.cpp
index 8ac68bbb22..ab0a166321 100644
--- a/ApplicationLibCode/Application/RiaGuiApplication.cpp
+++ b/ApplicationLibCode/Application/RiaGuiApplication.cpp
@@ -1574,7 +1574,7 @@ void RiaGuiApplication::stopMonitoringWorkProgress()
 //--------------------------------------------------------------------------------------------------
 void RiaGuiApplication::slotWorkerProcessFinished( int exitCode, QProcess::ExitStatus exitStatus )
 {
-    CAF_ASSERT( m_mainWindow );
+    if ( m_mainWindow == nullptr ) return;
 
     m_mainWindow->processMonitor()->stopMonitorWorkProcess();