diff --git a/src/freedombone-prepare-scripts b/src/freedombone-prepare-scripts
index 6edc099d..10a2b9af 100755
--- a/src/freedombone-prepare-scripts
+++ b/src/freedombone-prepare-scripts
@@ -35,8 +35,8 @@ cat /usr/local/bin/${PROJECT_NAME}-vars /usr/share/${PROJECT_NAME}/utils/${PROJE
 cat /tmp/includescripts /usr/local/bin/freedombone-controlpanel > /usr/local/bin/control
 cat /tmp/includescripts /usr/local/bin/freedombone-controlpanel-user > /usr/local/bin/controluser
 
-sed '/# Start including files/,/# End including files/d' /usr/local/bin/control
-sed '/# Start including files/,/# End including files/d' /usr/local/bin/controluser
+sed -i '/# Start including files/,/# End including files/d' /usr/local/bin/control
+sed -i '/# Start including files/,/# End including files/d' /usr/local/bin/controluser
 
 rm /tmp/includescripts