diff --git a/src/util.c b/src/util.c
index c011e8e9..01a4e348 100644
--- a/src/util.c
+++ b/src/util.c
@@ -558,7 +558,7 @@ ssize_t util_http_build_header(char * out, size_t len, ssize_t offset,
 #endif
 
     if (gmtime_result)
-        strftime(currenttime_buffer, sizeof(currenttime_buffer), "Date: %a, %d-%b-%Y %X GMT\r\n", gmtime_result);
+        strftime(currenttime_buffer, sizeof(currenttime_buffer), "Date: %a, %d %b %Y %X GMT\r\n", gmtime_result);
     else
         currenttime_buffer[0] = '\0';