diff --git a/unit-files/backup@.service b/unit-files/backup@.service
index daa4b3c9632a4e2bddcfdaefbd9f21ddf84ffab4..252fdef5365d40fcaa73e22abd5a799c50a6bf53 100644
--- a/unit-files/backup@.service
+++ b/unit-files/backup@.service
@@ -29,4 +29,4 @@ ExecStart=/bin/bash -euxc ' \
   git commit --allow-empty -m"backup %i @ `hostname` - `date`"; \
   echo "be careful: hidden sync functionnality"; \
   git pull --rebase; \
-  git push origin master'
+  git push -u origin master'