--- a/src/misc2.c
+++ b/src/misc2.c
@@ -73,7 +73,7 @@ coladvance_force(colnr_T wcol)
  * Get the screen position of character col with a coladd in the cursor line.
  */
     int
-getviscol2(colnr_T col, colnr_T coladd)
+getviscol2(colnr_T col, colnr_T coladd UNUSED)
 {
     colnr_T	x;
     pos_T	pos;
@@ -320,11 +320,9 @@ coladvance2(
     }
 #endif
 
-#ifdef FEAT_MBYTE
     /* prevent from moving onto a trail byte */
     if (has_mbyte)
 	mb_adjustpos(curbuf, pos);
-#endif
 
     if (col < wcol)
 	return FAIL;
@@ -358,7 +356,6 @@ inc(pos_T *lp)
 	p = ml_get_pos(lp);
 	if (*p != NUL)	/* still within line, move to next char (may be NUL) */
 	{
-#ifdef FEAT_MBYTE
 	    if (has_mbyte)
 	    {
 		int l = (*mb_ptr2len)(p);
@@ -366,7 +363,6 @@ inc(pos_T *lp)
 		lp->col += l;
 		return ((p[l] != NUL) ? 0 : 2);
 	    }
-#endif
 	    lp->col++;
 #ifdef FEAT_VIRTUALEDIT
 	    lp->coladd = 0;
@@ -424,10 +420,8 @@ dec(pos_T *lp)
 	/* past end of line */
 	p = ml_get(lp->lnum);
 	lp->col = (colnr_T)STRLEN(p);
-#ifdef FEAT_MBYTE
 	if (has_mbyte)
 	    lp->col -= (*mb_head_off)(p, p + lp->col);
-#endif
 	return 0;
     }
 
@@ -435,13 +429,11 @@ dec(pos_T *lp)
     {
 	/* still within line */
 	lp->col--;
-#ifdef FEAT_MBYTE
 	if (has_mbyte)
 	{
 	    p = ml_get(lp->lnum);
 	    lp->col -= (*mb_head_off)(p, p + lp->col);
 	}
-#endif
 	return 0;
     }
 
@@ -451,10 +443,8 @@ dec(pos_T *lp)
 	lp->lnum--;
 	p = ml_get(lp->lnum);
 	lp->col = (colnr_T)STRLEN(p);
-#ifdef FEAT_MBYTE
 	if (has_mbyte)
 	    lp->col -= (*mb_head_off)(p, p + lp->col);
-#endif
 	return 1;
     }
 
@@ -608,11 +598,9 @@ check_cursor_col_win(win_T *win)
 	else
 	{
 	    win->w_cursor.col = len - 1;
-#ifdef FEAT_MBYTE
 	    /* Move the cursor to the head byte. */
 	    if (has_mbyte)
 		mb_adjustpos(win->w_buffer, &win->w_cursor);
-#endif
 	}
     }
     else if (win->w_cursor.col < 0)
@@ -1394,9 +1382,7 @@ vim_strsave_escaped_ext(
     char_u	*p2;
     char_u	*escaped_string;
     unsigned	length;
-#ifdef FEAT_MBYTE
     int		l;
-#endif
 
     /*
      * First count the number of backslashes required.
@@ -1405,14 +1391,12 @@ vim_strsave_escaped_ext(
     length = 1;				/* count the trailing NUL */
     for (p = string; *p; p++)
     {
-#ifdef FEAT_MBYTE
 	if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
 	{
 	    length += l;		/* count a multibyte char */
 	    p += l - 1;
 	    continue;
 	}
-#endif
 	if (vim_strchr(esc_chars, *p) != NULL || (bsl && rem_backslash(p)))
 	    ++length;			/* count a backslash */
 	++length;			/* count an ordinary char */
@@ -1423,7 +1407,6 @@ vim_strsave_escaped_ext(
 	p2 = escaped_string;
 	for (p = string; *p; p++)
 	{
-#ifdef FEAT_MBYTE
 	    if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
 	    {
 		mch_memmove(p2, p, (size_t)l);
@@ -1431,7 +1414,6 @@ vim_strsave_escaped_ext(
 		p += l - 1;		/* skip multibyte char  */
 		continue;
 	    }
-#endif
 	    if (vim_strchr(esc_chars, *p) != NULL || (bsl && rem_backslash(p)))
 		*p2++ = cc;
 	    *p2++ = *p;
@@ -1642,7 +1624,6 @@ strup_save(char_u *orig)
     if (res != NULL)
 	while (*p != NUL)
 	{
-# ifdef FEAT_MBYTE
 	    int		l;
 
 	    if (enc_utf8)
@@ -1685,7 +1666,6 @@ strup_save(char_u *orig)
 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
 		p += l;		/* skip multi-byte character */
 	    else
-# endif
 	    {
 		*p = TOUPPER_LOC(*p); /* note that toupper() can be a macro */
 		p++;
@@ -1711,7 +1691,6 @@ strlow_save(char_u *orig)
     if (res != NULL)
 	while (*p != NUL)
 	{
-# ifdef FEAT_MBYTE
 	    int		l;
 
 	    if (enc_utf8)
@@ -1754,7 +1733,6 @@ strlow_save(char_u *orig)
 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
 		p += l;		/* skip multi-byte character */
 	    else
-# endif
 	    {
 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
 		p++;
@@ -1943,7 +1921,6 @@ vim_strchr(char_u *string, int c)
     int		b;
 
     p = string;
-#ifdef FEAT_MBYTE
     if (enc_utf8 && c >= 0x80)
     {
 	while (*p != NUL)
@@ -1980,7 +1957,6 @@ vim_strchr(char_u *string, int c)
 	}
 	return NULL;
     }
-#endif
     while ((b = *p) != NUL)
     {
 	if (b == c)
@@ -2713,11 +2689,7 @@ get_special_key_name(int c, int modifier
      * When not a known special key, and not a printable character, try to
      * extract modifiers.
      */
-    if (c > 0
-#ifdef FEAT_MBYTE
-	    && (*mb_char2len)(c) == 1
-#endif
-       )
+    if (c > 0 && (*mb_char2len)(c) == 1)
     {
 	if (table_idx < 0
 		&& (!vim_isprintc(c) || (c & 0x7f) == ' ')
@@ -2760,12 +2732,9 @@ get_special_key_name(int c, int modifier
 	/* Not a special key, only modifiers, output directly */
 	else
 	{
-#ifdef FEAT_MBYTE
 	    if (has_mbyte && (*mb_char2len)(c) > 1)
 		idx += (*mb_char2bytes)(c, string + idx);
-	    else
-#endif
-	    if (vim_isprintc(c))
+	    else if (vim_isprintc(c))
 		string[idx++] = c;
 	    else
 	    {
@@ -2825,10 +2794,8 @@ trans_special(
 	dst[dlen++] = KEY2TERMCAP0(key);
 	dst[dlen++] = KEY2TERMCAP1(key);
     }
-#ifdef FEAT_MBYTE
     else if (has_mbyte && !keycode)
 	dlen += (*mb_char2bytes)(key, dst + dlen);
-#endif
     else if (keycode)
 	dlen = (int)(add_char2buf(key, dst + dlen) - dst);
     else
@@ -2873,11 +2840,9 @@ find_special_key(
 	    last_dash = bp;
 	    if (bp[1] != NUL)
 	    {
-#ifdef FEAT_MBYTE
 		if (has_mbyte)
 		    l = mb_ptr2len(bp + 1);
 		else
-#endif
 		    l = 1;
 		/* Anything accepted, like <C-?>.
 		 * <C-"> or <M-"> are not special in strings as " is
@@ -2935,11 +2900,9 @@ find_special_key(
 		/* Modifier with single letter, or special key name.  */
 		if (in_string && last_dash[1] == '\\' && last_dash[2] == '"')
 		    off = 2;
-#ifdef FEAT_MBYTE
 		if (has_mbyte)
 		    l = mb_ptr2len(last_dash + off);
 		else
-#endif
 		    l = 1;
 		if (modifiers != 0 && last_dash[l + off] == '>')
 		    key = PTR2CHAR(last_dash + off);
@@ -3028,10 +2991,7 @@ extract_modifiers(int key, int *modp)
     if (!(modifiers & MOD_MASK_CMD))
 #endif
     if ((modifiers & MOD_MASK_ALT) && key < 0x80
-#ifdef FEAT_MBYTE
-	    && !enc_dbcs		/* avoid creating a lead byte */
-#endif
-	    )
+	    && !enc_dbcs)		// avoid creating a lead byte
     {
 	key |= 0x80;
 	modifiers &= ~MOD_MASK_ALT;	/* remove the META modifier */
@@ -3377,7 +3337,6 @@ get_real_state(void)
     return State;
 }
 
-#if defined(FEAT_MBYTE) || defined(PROTO)
 /*
  * Return TRUE if "p" points to just after a path separator.
  * Takes care of multi-byte characters.
@@ -3389,7 +3348,6 @@ after_pathsep(char_u *b, char_u *p)
     return p > b && vim_ispathsep(p[-1])
 			     && (!has_mbyte || (*mb_head_off)(b, p - 1) == 0);
 }
-#endif
 
 /*
  * Return TRUE if file names "f1" and "f2" are in the same directory.
@@ -6376,8 +6334,7 @@ time_to_bytes(time_T the_time, char_u *b
 
 #endif
 
-#if (defined(FEAT_MBYTE) && defined(FEAT_QUICKFIX)) \
-	|| defined(FEAT_SPELL) || defined(PROTO)
+#if defined(FEAT_QUICKFIX) || defined(FEAT_SPELL) || defined(PROTO)
 /*
  * Return TRUE if string "s" contains a non-ASCII character (128 or higher).
  * When "s" is NULL FALSE is returned.