diff --git a/src/shared/util.c b/src/shared/util.c
index d771d321dd..37fd1adfc9 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -1968,7 +1968,7 @@ char *format_timestamp(char *buf, size_t l, usec_t t) {
 
         sec = (time_t) (t / USEC_PER_SEC);
 
-        if (strftime(buf, l, "%a, %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) <= 0)
+        if (strftime(buf, l, "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) <= 0)
                 return NULL;
 
         return buf;