diff --git a/src/basic/process-util.c b/src/basic/process-util.c
index de5a1469b98..d9e8bc9fc99 100644
--- a/src/basic/process-util.c
+++ b/src/basic/process-util.c
@@ -2036,7 +2036,7 @@ int posix_spawn_wrapper(
                 const char *cgroup,
                 PidRef *ret_pidref) {
 
-        short flags = POSIX_SPAWN_SETSIGMASK|POSIX_SPAWN_SETSIGDEF;
+        short flags = POSIX_SPAWN_SETSIGMASK;
         posix_spawnattr_t attr;
         sigset_t mask;
         int r;