--- a/src/macros.h
+++ b/src/macros.h
@@ -96,17 +96,10 @@
  * MB_ISLOWER() and MB_ISUPPER() are to be used on multi-byte characters.  But
  * don't use them for negative values!
  */
-#ifdef FEAT_MBYTE
-# define MB_ISLOWER(c)	vim_islower(c)
-# define MB_ISUPPER(c)	vim_isupper(c)
-# define MB_TOLOWER(c)	vim_tolower(c)
-# define MB_TOUPPER(c)	vim_toupper(c)
-#else
-# define MB_ISLOWER(c)	islower(c)
-# define MB_ISUPPER(c)	isupper(c)
-# define MB_TOLOWER(c)	TOLOWER_LOC(c)
-# define MB_TOUPPER(c)	TOUPPER_LOC(c)
-#endif
+#define MB_ISLOWER(c)	vim_islower(c)
+#define MB_ISUPPER(c)	vim_isupper(c)
+#define MB_TOLOWER(c)	vim_tolower(c)
+#define MB_TOUPPER(c)	vim_toupper(c)
 
 /* Use our own isdigit() replacement, because on MS-Windows isdigit() returns
  * non-zero for superscript 1.  Also avoids that isdigit() crashes for numbers
@@ -139,8 +132,7 @@
  * a mapping and the langnoremap option was set.
  * The do-while is just to ignore a ';' after the macro.
  */
-# ifdef FEAT_MBYTE
-#  define LANGMAP_ADJUST(c, condition) \
+# define LANGMAP_ADJUST(c, condition) \
     do { \
 	if (*p_langmap \
 		&& (condition) \
@@ -154,17 +146,6 @@
 		c = langmap_adjust_mb(c); \
 	} \
     } while (0)
-# else
-#  define LANGMAP_ADJUST(c, condition) \
-    do { \
-	if (*p_langmap \
-		&& (condition) \
-		&& (p_lrm || (!p_lrm && KeyTyped)) \
-		&& !KeyStuffed \
-		&& (c) >= 0 && (c) < 256) \
-	    c = langmap_mapchar[c]; \
-    } while (0)
-# endif
 #else
 # define LANGMAP_ADJUST(c, condition) /* nop */
 #endif
@@ -256,33 +237,21 @@
  * MB_COPY_CHAR(f, t): copy one char from "f" to "t" and advance the pointers.
  * PTR2CHAR(): get character from pointer.
  */
-#ifdef FEAT_MBYTE
 /* Get the length of the character p points to, including composing chars */
-# define MB_PTR2LEN(p)	    (has_mbyte ? (*mb_ptr2len)(p) : 1)
+#define MB_PTR2LEN(p)	    (has_mbyte ? (*mb_ptr2len)(p) : 1)
 /* Advance multi-byte pointer, skip over composing chars. */
-# define MB_PTR_ADV(p)	    p += has_mbyte ? (*mb_ptr2len)(p) : 1
+#define MB_PTR_ADV(p)	    p += has_mbyte ? (*mb_ptr2len)(p) : 1
 /* Advance multi-byte pointer, do not skip over composing chars. */
-# define MB_CPTR_ADV(p)	    p += enc_utf8 ? utf_ptr2len(p) : has_mbyte ? (*mb_ptr2len)(p) : 1
+#define MB_CPTR_ADV(p)	    p += enc_utf8 ? utf_ptr2len(p) : has_mbyte ? (*mb_ptr2len)(p) : 1
 /* Backup multi-byte pointer. Only use with "p" > "s" ! */
-# define MB_PTR_BACK(s, p)  p -= has_mbyte ? ((*mb_head_off)(s, p - 1) + 1) : 1
+#define MB_PTR_BACK(s, p)  p -= has_mbyte ? ((*mb_head_off)(s, p - 1) + 1) : 1
 /* get length of multi-byte char, not including composing chars */
-# define MB_CPTR2LEN(p)	    (enc_utf8 ? utf_ptr2len(p) : (*mb_ptr2len)(p))
+#define MB_CPTR2LEN(p)	    (enc_utf8 ? utf_ptr2len(p) : (*mb_ptr2len)(p))
 
-# define MB_COPY_CHAR(f, t) if (has_mbyte) mb_copy_char(&f, &t); else *t++ = *f++
-# define MB_CHARLEN(p)	    (has_mbyte ? mb_charlen(p) : (int)STRLEN(p))
-# define MB_CHAR2LEN(c)	    (has_mbyte ? mb_char2len(c) : 1)
-# define PTR2CHAR(p)	    (has_mbyte ? mb_ptr2char(p) : (int)*(p))
-#else
-# define MB_PTR2LEN(p)		1
-# define MB_CPTR2LEN(p)		1
-# define MB_PTR_ADV(p)		++p
-# define MB_CPTR_ADV(p)		++p
-# define MB_PTR_BACK(s, p)	--p
-# define MB_COPY_CHAR(f, t)	*t++ = *f++
-# define MB_CHARLEN(p)		STRLEN(p)
-# define MB_CHAR2LEN(c)		1
-# define PTR2CHAR(p)		((int)*(p))
-#endif
+#define MB_COPY_CHAR(f, t) if (has_mbyte) mb_copy_char(&f, &t); else *t++ = *f++
+#define MB_CHARLEN(p)	    (has_mbyte ? mb_charlen(p) : (int)STRLEN(p))
+#define MB_CHAR2LEN(c)	    (has_mbyte ? mb_char2len(c) : 1)
+#define PTR2CHAR(p)	    (has_mbyte ? mb_ptr2char(p) : (int)*(p))
 
 #ifdef FEAT_AUTOCHDIR
 # define DO_AUTOCHDIR do { if (p_acd) do_autochdir(); } while (0)