diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index a70fc41d1a..f5be619ad6 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -1258,6 +1258,7 @@ int get_timezones(char ***ret) {
                 }
 
                 strv_sort(zones);
+                strv_uniq(zones);
 
         } else if (errno != ENOENT)
                 return -errno;