diff --git a/src/charset.c b/src/charset.c
index 8a4fb7d..4df4e7f 100644
--- a/src/charset.c
+++ b/src/charset.c
@@ -10,17 +10,17 @@
 #include "vim.h"
 
 #ifdef FEAT_LINEBREAK
-static int win_chartabsize __ARGS((win_T *wp, char_u *p, colnr_T col));
+static int win_chartabsize(win_T *wp, char_u *p, colnr_T col);
 #endif
 
 #ifdef FEAT_MBYTE
 # if defined(HAVE_WCHAR_H)
 #  include <wchar.h>	    /* for towupper() and towlower() */
 # endif
-static int win_nolbr_chartabsize __ARGS((win_T *wp, char_u *s, colnr_T col, int *headp));
+static int win_nolbr_chartabsize(win_T *wp, char_u *s, colnr_T col, int *headp);
 #endif
 
-static unsigned nr2hex __ARGS((unsigned c));
+static unsigned nr2hex(unsigned c);
 
 static int    chartab_initialized = FALSE;