diff --git a/fhem/contrib/DEBIAN/postinst b/fhem/contrib/DEBIAN/postinst
index 158140f36..a84bc79ee 100644
--- a/fhem/contrib/DEBIAN/postinst
+++ b/fhem/contrib/DEBIAN/postinst
@@ -12,7 +12,9 @@ chown -R fhem:dialout /opt/fhem
 
 # remove repository entry after first installation
 echo "removing repo from sources"
+if [ -f /etc/apt/sources.list ]; then
 sed -i /debian.fhem.de/d /etc/apt/sources.list
+fi
 if [ -f /etc/apt/sources.list.d/debianfhemde.list ]; then
   rm /etc/apt/sources.list.d/debianfhemde.list
 fi