diff --git a/src/basic/async.c b/src/basic/async.c
index 73de889a2b0..5e347dde8b0 100644
--- a/src/basic/async.c
+++ b/src/basic/async.c
@@ -72,7 +72,7 @@ int asynchronous_sync(pid_t *ret_pid) {
                 return r;
         if (r == 0) {
                 /* Child process */
-                (void) sync();
+                sync();
                 _exit(EXIT_SUCCESS);
         }
 
diff --git a/src/systemctl/systemctl-util.c b/src/systemctl/systemctl-util.c
index b6b28a113d8..074bb8d83be 100644
--- a/src/systemctl/systemctl-util.c
+++ b/src/systemctl/systemctl-util.c
@@ -921,7 +921,7 @@ int halt_now(enum action a) {
         /* The kernel will automatically flush ATA disks and suchlike on reboot(), but the file systems need
          * to be synced explicitly in advance. */
         if (!arg_no_sync && !arg_dry_run)
-                (void) sync();
+                sync();
 
         /* Make sure C-A-D is handled by the kernel from this point on... */
         if (!arg_dry_run)