diff --git a/src/partition/repart.c b/src/partition/repart.c
index 28c9de7b2b..83582b4691 100644
--- a/src/partition/repart.c
+++ b/src/partition/repart.c
@@ -3833,7 +3833,7 @@ static int find_root(char **ret, int *ret_fd) {
                         if (!s)
                                 return log_oom();
 
-                        fd = open(arg_node, O_RDONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOFOLLOW, 0777);
+                        fd = open(arg_node, O_RDONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOFOLLOW, 0666);
                         if (fd < 0)
                                 return log_error_errno(errno, "Failed to create '%s': %m", arg_node);