diff -Naur ./k9copy.orig/src/backup/k9execcopy.cpp ./k9copy/src/backup/k9execcopy.cpp
--- ./k9copy.orig/src/backup/k9execcopy.cpp	2017-01-05 10:38:21.585287663 -0500
+++ ./k9copy/src/backup/k9execcopy.cpp	2017-01-05 10:38:56.048204571 -0500
@@ -306,7 +306,7 @@
 
 #if QT_VERSION >= 0x050000
     m_progressDialog=new QProgressDialog(k9Dialogs::getMainWidget() );
-    m_progressDialog->setCancelButton(false);
+    m_progressDialog->setCancelButton(NULL);
 
 #else
     m_progressDialog=new KProgressDialog(k9Dialogs::getMainWidget() );