diff --git a/src/gui_x11.c b/src/gui_x11.c
index 1c55805..c8a3b77 100644
--- a/src/gui_x11.c
+++ b/src/gui_x11.c
@@ -748,7 +748,7 @@
     gui_focus_change(FALSE);
 }
 
-#if defined(X_HAVE_UTF8_STRING) && defined(FEAT_MBYTE)
+#if defined(X_HAVE_UTF8_STRING)
 # if X_HAVE_UTF8_STRING
 #  define USE_UTF8LOOKUP
 # endif
@@ -810,13 +810,12 @@
 	if (status == XLookupNone || status == XLookupChars)
 	    key_sym = XK_VoidSymbol;
 
-# ifdef FEAT_MBYTE
 	/* Do conversion from 'termencoding' to 'encoding'.  When using
 	 * Xutf8LookupString() it has already been done. */
 	if (len > 0 && input_conv.vc_type != CONV_NONE
-#  ifdef USE_UTF8LOOKUP
+# ifdef USE_UTF8LOOKUP
 		&& !enc_utf8
-#  endif
+# endif
 		)
 	{
 	    int		maxlen = len * 4 + 40;	/* guessed */
@@ -829,7 +828,6 @@
 	    string_alloced = True;
 	    len = convert_input(p, len, maxlen);
 	}
-# endif
 
 	/* Translate CSI to K_CSI, otherwise it could be recognized as the
 	 * start of a special key. */
@@ -901,10 +899,7 @@
 	    && (ev_press->state & Mod1Mask)
 	    && !(key_sym == XK_BackSpace || key_sym == XK_Delete)
 	    && (string[0] & 0x80) == 0
-#ifdef FEAT_MBYTE
-	    && !enc_dbcs
-#endif
-	    )
+	    && !enc_dbcs)
     {
 #if defined(FEAT_MENU) && defined(FEAT_GUI_MOTIF)
 	/* Ignore ALT keys when they are used for the menu only */
@@ -930,7 +925,6 @@
 		&& !(key_sym == XK_Tab && (ev_press->state & ShiftMask)))
 	{
 	    string[0] |= 0x80;
-#ifdef FEAT_MBYTE
 	    if (enc_utf8) /* convert to utf-8 */
 	    {
 		string[1] = string[0] & 0xbf;
@@ -944,7 +938,6 @@
 		else
 		    len = 2;
 	    }
-#endif
 	}
 	else
 	    ev_press->state |= Mod1Mask;
@@ -983,10 +976,7 @@
     if (len == -3 || key_sym == XK_space || key_sym == XK_Tab
 	    || key_sym == XK_Return || key_sym == XK_Linefeed
 	    || key_sym == XK_Escape
-#ifdef FEAT_MBYTE
-	    || (enc_dbcs && len == 1 && (ev_press->state & Mod1Mask))
-#endif
-       )
+	    || (enc_dbcs && len == 1 && (ev_press->state & Mod1Mask)))
     {
 	modifiers = 0;
 	if (ev_press->state & ShiftMask)
@@ -2375,7 +2365,6 @@
     int		flags)
 {
     int			cells = len;
-#ifdef FEAT_MBYTE
     static void		*buf = NULL;
     static int		buflen = 0;
     char_u		*p;
@@ -2399,17 +2388,17 @@
 	while (p < s + len)
 	{
 	    c = utf_ptr2char(p);
-# ifdef FEAT_XFONTSET
+#ifdef FEAT_XFONTSET
 	    if (current_fontset != NULL)
 	    {
-#  ifdef SMALL_WCHAR_T
+# ifdef SMALL_WCHAR_T
 		if (c >= 0x10000)
 		    c = 0xbf;		/* show chars > 0xffff as ? */
-#  endif
+# endif
 		((wchar_t *)buf)[wlen] = c;
 	    }
 	    else
-# endif
+#endif
 	    {
 		if (c >= 0x10000)
 		    c = 0xbf;		/* show chars > 0xffff as ? */
@@ -2431,8 +2420,6 @@
 	}
     }
 
-#endif
-
 #ifdef FEAT_XFONTSET
     if (current_fontset != NULL)
     {
@@ -2452,12 +2439,10 @@
 
     if (flags & DRAW_TRANSP)
     {
-#ifdef FEAT_MBYTE
 	if (enc_utf8)
 	    XDrawString16(gui.dpy, gui.wid, gui.text_gc, TEXT_X(col),
 		    TEXT_Y(row), buf, wlen);
 	else
-#endif
 	    XDrawString(gui.dpy, gui.wid, gui.text_gc, TEXT_X(col),
 		    TEXT_Y(row), (char *)s, len);
     }
@@ -2472,24 +2457,20 @@
 		FILL_Y(row), gui.char_width * cells, gui.char_height);
 	XSetForeground(gui.dpy, gui.text_gc, prev_fg_color);
 
-#ifdef FEAT_MBYTE
 	if (enc_utf8)
 	    XDrawString16(gui.dpy, gui.wid, gui.text_gc, TEXT_X(col),
 		    TEXT_Y(row), buf, wlen);
 	else
-#endif
 	    XDrawString(gui.dpy, gui.wid, gui.text_gc, TEXT_X(col),
 		    TEXT_Y(row), (char *)s, len);
     }
     else
     {
 	/* XmbDrawImageString has bug, don't use it for fontset. */
-#ifdef FEAT_MBYTE
 	if (enc_utf8)
 	    XDrawImageString16(gui.dpy, gui.wid, gui.text_gc, TEXT_X(col),
 		    TEXT_Y(row), buf, wlen);
 	else
-#endif
 	    XDrawImageString(gui.dpy, gui.wid, gui.text_gc, TEXT_X(col),
 		    TEXT_Y(row), (char *)s, len);
     }
@@ -2497,12 +2478,10 @@
     /* Bold trick: draw the text again with a one-pixel offset. */
     if (flags & DRAW_BOLD)
     {
-#ifdef FEAT_MBYTE
 	if (enc_utf8)
 	    XDrawString16(gui.dpy, gui.wid, gui.text_gc, TEXT_X(col) + 1,
 		    TEXT_Y(row), buf, wlen);
 	else
-#endif
 	    XDrawString(gui.dpy, gui.wid, gui.text_gc, TEXT_X(col) + 1,
 		    TEXT_Y(row), (char *)s, len);
     }
@@ -2628,10 +2607,8 @@
 {
     int		w = 1;
 
-#ifdef FEAT_MBYTE
     if (mb_lefthalve(gui.row, gui.col))
 	w = 2;
-#endif
     gui_mch_set_fg_color(color);
     XDrawRectangle(gui.dpy, gui.wid, gui.text_gc, FILL_X(gui.col),
 	    FILL_Y(gui.row), w * gui.char_width - 1, gui.char_height - 1);