diff --git a/src/mbyte.c b/src/mbyte.c
index 29385a9..fe56731 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -4385,45 +4385,31 @@
 
 #if defined(FEAT_MBYTE) || defined(PROTO)
 
-#ifdef HAVE_LANGINFO_H
-# include <langinfo.h>
-#endif
+# ifdef HAVE_LANGINFO_H
+#  include <langinfo.h>
+# endif
 
+# ifndef FEAT_GUI_W32
 /*
- * Get the canonicalized encoding of the current locale.
+ * Get the canonicalized encoding from the specified locale string "locale"
+ * or from the environment variables LC_ALL, LC_CTYPE and LANG.
  * Returns an allocated string when successful, NULL when not.
  */
     char_u *
-enc_locale(void)
+enc_locale_env(char *locale)
 {
-#ifndef WIN3264
-    char	*s;
+    char	*s = locale;
     char	*p;
     int		i;
-#endif
     char	buf[50];
-#ifdef WIN3264
-    long	acp = GetACP();
-
-    if (acp == 1200)
-	STRCPY(buf, "ucs-2le");
-    else if (acp == 1252)	    /* cp1252 is used as latin1 */
-	STRCPY(buf, "latin1");
-    else
-	sprintf(buf, "cp%ld", acp);
-#else
-# ifdef HAVE_NL_LANGINFO_CODESET
-    if ((s = nl_langinfo(CODESET)) == NULL || *s == NUL)
-# endif
-#  if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
-	if ((s = setlocale(LC_CTYPE, NULL)) == NULL || *s == NUL)
-#  endif
-	    if ((s = getenv("LC_ALL")) == NULL || *s == NUL)
-		if ((s = getenv("LC_CTYPE")) == NULL || *s == NUL)
-		    s = getenv("LANG");
 
     if (s == NULL || *s == NUL)
-	return FAIL;
+	if ((s = getenv("LC_ALL")) == NULL || *s == NUL)
+	    if ((s = getenv("LC_CTYPE")) == NULL || *s == NUL)
+		s = getenv("LANG");
+
+    if (s == NULL || *s == NUL)
+	return NULL;
 
     /* The most generic locale format is:
      * language[_territory][.codeset][@modifier][+special][,[sponsor][_revision]]
@@ -4458,12 +4444,46 @@
 	    break;
     }
     buf[i] = NUL;
-#endif
 
     return enc_canonize((char_u *)buf);
 }
+# endif
 
-#if defined(WIN3264) || defined(PROTO) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
+/*
+ * Get the canonicalized encoding of the current locale.
+ * Returns an allocated string when successful, NULL when not.
+ */
+    char_u *
+enc_locale(void)
+{
+# ifdef WIN3264
+    char	buf[50];
+    long	acp = GetACP();
+
+    if (acp == 1200)
+	STRCPY(buf, "ucs-2le");
+    else if (acp == 1252)	    /* cp1252 is used as latin1 */
+	STRCPY(buf, "latin1");
+    else
+	sprintf(buf, "cp%ld", acp);
+
+    return enc_canonize((char_u *)buf);
+# else
+    char	*s;
+
+#  ifdef HAVE_NL_LANGINFO_CODESET
+    if ((s = nl_langinfo(CODESET)) == NULL || *s == NUL)
+#  endif
+#  if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
+	if ((s = setlocale(LC_CTYPE, NULL)) == NULL || *s == NUL)
+#  endif
+	    s = NULL;
+
+    return enc_locale_env(s);
+# endif
+}
+
+# if defined(WIN3264) || defined(PROTO) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
 /*
  * Convert an encoding name to an MS-Windows codepage.
  * Returns zero if no codepage can be figured out.
@@ -4490,7 +4510,7 @@
 	return cp;
     return 0;
 }
-#endif
+# endif
 
 # if defined(USE_ICONV) || defined(PROTO)