1 files changed, 5 insertions, 1 deletions
diff --git a/src/basic/clock-util.c b/src/basic/clock-util.c
index 00ee4c2796..05788a360e 100644
--- a/src/basic/clock-util.c
+++ b/src/basic/clock-util.c
@@ -21,6 +21,9 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <time.h>
 #include <linux/rtc.h>
 #include <stdio.h>
 #include <sys/ioctl.h>
@@ -119,7 +122,8 @@ int clock_set_timezone(int *min) {
          * have read from the RTC.
          */
         if (settimeofday(tv_null, &tz) < 0)
-                return -errno;
+                return negative_errno();
+
         if (min)
                 *min = minutesdelta;
         return 0;