1 files changed, 3 insertions, 1 deletions

diff --git a/lib/time_rz.c b/lib/time_rz.c
index cbbe2c6ac2f..f94893aa2c1 100644
--- a/lib/time_rz.c
+++ b/lib/time_rz.c
@@ -105,7 +105,9 @@ tzalloc (char const *name)
       tz->tzname_copy[0] = tz->tzname_copy[1] = NULL;
 #endif
       tz->tz_is_set = !!name;
-      extend_abbrs (tz->abbrs, name, name_size);
+      tz->abbrs[0] = '\0';
+      if (name)
+        extend_abbrs (tz->abbrs, name, name_size);
     }
   return tz;
 }