diff --git a/src/lfs.c b/src/lfs.c
index 866740f..159ca59 100644
--- a/src/lfs.c
+++ b/src/lfs.c
@@ -117,10 +117,10 @@ typedef struct dir_data {
 
 #ifdef _WIN32
  #ifdef __BORLANDC__
-  #define lfs_setmode(L,file,m)   ((void)L, setmode(_fileno(file), m))
+  #define lfs_setmode(file, m)   (setmode(_fileno(file), m))
   #define STAT_STRUCT struct stati64
  #else
-  #define lfs_setmode(L,file,m)   ((void)L, _setmode(_fileno(file), m))
+  #define lfs_setmode(file, m)   (_setmode(_fileno(file), m))
   #define STAT_STRUCT struct _stati64
  #endif
 #define STAT_FUNC _stati64
@@ -128,7 +128,7 @@ typedef struct dir_data {
 #else
 #define _O_TEXT               0
 #define _O_BINARY             0
-#define lfs_setmode(L,file,m)   ((void)L, (void)file, (void)m, 0)
+#define lfs_setmode(file, m)   ((void)file, (void)m, 0)
 #define STAT_STRUCT struct stat
 #define STAT_FUNC stat
 #define LSTAT_FUNC lstat
@@ -347,25 +347,20 @@ static int lfs_g_setmode (lua_State *L, FILE *f, int arg) {
   static const int mode[] = {_O_BINARY, _O_TEXT};
   static const char *const modenames[] = {"binary", "text", NULL};
   int op = luaL_checkoption(L, arg, NULL, modenames);
-  int res = lfs_setmode(L, f, mode[op]);
+  int res = lfs_setmode(f, mode[op]);
   if (res != -1) {
     int i;
     lua_pushboolean(L, 1);
     for (i = 0; modenames[i] != NULL; i++) {
       if (mode[i] == res) {
         lua_pushstring(L, modenames[i]);
-        goto exit;
+        return 2;
       }
     }
     lua_pushnil(L);
-  exit:
     return 2;
   } else {
-    int en = errno;
-    lua_pushnil(L);
-    lua_pushfstring(L, "%s", strerror(en));
-    lua_pushinteger(L, en);
-    return 3;
+    return pusherror(L, NULL);
   }
 }