diff --git a/src/server/distrenjob.c b/src/server/distrenjob.c
--- a/src/server/distrenjob.c
+++ b/src/server/distrenjob.c
@@ -225,6 +225,11 @@ int distrenjob_unserialize(struct distre
   xmlchar = xmlGetProp(xmlnode, (xmlChar *)"total_render_time");
   if(xmlchar)
     {
+      /*
+       * even though GCC says this is implicitly declared, POSIX
+       * requires that time.h declare this function. Thus, we don't
+       * have to worry about the warning.
+       */
       if(strptime((char *)xmlchar, "%D %T", &tm))
 	dj->total_render_time = mktime(&tm);
       xmlFree(xmlchar);