diff --git a/ui-refs.c b/ui-refs.c
index ac8a6d4..d3d71dd 100644
--- a/ui-refs.c
+++ b/ui-refs.c
@@ -82,7 +82,7 @@
 	return 0;
 }
 
-static void print_tag_header()
+static void print_tag_header(void)
 {
 	html("<tr class='nohover'><th class='left'>Tag</th>"
 	     "<th class='left'>Download</th>"
@@ -234,7 +234,7 @@
 	cgit_free_reflist_inner(&list);
 }
 
-void cgit_print_refs()
+void cgit_print_refs(void)
 {
 
 	html("<table class='list nowrap'>");