diff --git a/src/digraph.c b/src/digraph.c
index ba24e3f..5814ab2 100644
--- a/src/digraph.c
+++ b/src/digraph.c
@@ -28,8 +28,8 @@
     result_T	result;
 } digr_T;
 
-static int getexactdigraph __ARGS((int, int, int));
-static void printdigraph __ARGS((digr_T *));
+static int getexactdigraph(int, int, int);
+static void printdigraph(digr_T *);
 
 /* digraphs added by the user */
 static garray_T	user_digraphs = {0, 0, (int)sizeof(digr_T), 10, NULL};
@@ -2357,7 +2357,7 @@
 
 #define KMAP_MAXLEN 20	    /* maximum length of "from" or "to" */
 
-static void keymap_unload __ARGS((void));
+static void keymap_unload(void);
 
 /*
  * Set up key mapping tables for the 'keymap' option.