1 files changed, 5 insertions, 3 deletions
diff --git a/mkfontscale/list.h b/mkfontscale/list.h
index 463933dfd..686fd9b09 100644
--- a/mkfontscale/list.h
+++ b/mkfontscale/list.h
@@ -23,7 +23,9 @@
 #ifndef _MKS_LIST_H_
 #define _MKS_LIST_H_ 1
 
-char *dsprintf(char *f, ...);
+#include <X11/Xfuncproto.h> /* for _X_ATTRIBUTE_PRINTF */
+
+char *dsprintf(char *f, ...) _X_ATTRIBUTE_PRINTF(1,2);
 
 typedef struct _List {
     char *value;
@@ -33,8 +35,8 @@ typedef struct _List {
 int listMember(char *elt, ListPtr list);
 ListPtr listCons(char *car, ListPtr cdr);
 ListPtr listAdjoin(char *car, ListPtr cdr);
-ListPtr listConsF(ListPtr cdr, char *f, ...);
-ListPtr listAdjoinF(ListPtr cdr, char *f, ...);
+ListPtr listConsF(ListPtr cdr, char *f, ...) _X_ATTRIBUTE_PRINTF(2,3);
+ListPtr listAdjoinF(ListPtr cdr, char *f, ...) _X_ATTRIBUTE_PRINTF(2,3);
 int listLength(ListPtr list);
 ListPtr appendList(ListPtr first, ListPtr second);
 ListPtr makeList(char **a, int n, ListPtr old, int begin);