Index: server/protocol.c
===================================================================
--- server/protocol.c	(revision 393107)
+++ server/protocol.c	(working copy)
@@ -513,6 +513,9 @@
         if (r->parsed_uri.scheme
             && !strcasecmp(r->parsed_uri.scheme, ap_http_scheme(r))) {
             r->hostname = r->parsed_uri.hostname;
+
+            if (r->parsed_uri.path == NULL)
+                r->parsed_uri.path = apr_pstrdup(r->pool, "/");
         }
         else if (r->method_number == M_CONNECT) {
             r->hostname = r->parsed_uri.hostname;