Index: channels/sip/route.c
===================================================================
--- channels/sip/route.c	(revision 407935)
+++ channels/sip/route.c	(working copy)
@@ -175,8 +175,13 @@
 		i++;
 	}
 
-	if (formatcli && i <= 0) {
-		ast_str_append(&buf, 0, "N/A");
+	if (i <= 0) {
+		if (formatcli) {
+			ast_str_append(&buf, 0, "N/A");
+		} else if (skip) {
+			ast_free(buf);
+			return NULL;
+		}
 	}
 
 	return buf;
Index: channels/sip/include/route.h
===================================================================
--- channels/sip/include/route.h	(revision 407935)
+++ channels/sip/include/route.h	(working copy)
@@ -96,6 +96,7 @@
  *
  * \retval an allocated struct ast_str on success
  * \retval NULL on failure
+ * \retval NULL when formatcli and skip are non-zero and list no hops
  */
 struct ast_str *sip_route_list(const struct sip_route *route, int formatcli, int skip)
 		__attribute_malloc__ __attribute_warn_unused_result__;