diff --git a/include/_ctype.h b/include/_ctype.h
index acea53909cff..a1fc0a2e973e 100644
--- a/include/_ctype.h
+++ b/include/_ctype.h
@@ -67,6 +67,8 @@
 #define	_CTYPE_SW1	0x40000000L		/* 1 width character */
 #define	_CTYPE_SW2	0x80000000L		/* 2 width character */
 #define	_CTYPE_SW3	0xc0000000L		/* 3 width character */
+#define	_CTYPE_SWM	0xe0000000L		/* Mask for screen width data */
+#define	_CTYPE_SWS	30			/* Bits to shift to get width */
 
 /* See comments in <sys/_types.h> about __ct_rune_t. */
 __BEGIN_DECLS
@@ -127,6 +129,19 @@ __tolower(__ct_rune_t _c)
 	       _CurrentRuneLocale->__maplower[_c];
 }
 
+static __inline int
+__wcwidth(__ct_rune_t _c)
+{
+	unsigned int _x;
+
+	if (_c == 0)
+		return (0);
+	_x = (unsigned int)__maskrune(_c, _CTYPE_SWM|_CTYPE_R);
+	if ((_x & _CTYPE_SWM) != 0)
+		return ((_x & _CTYPE_SWM) >> _CTYPE_SWS);
+	return ((_x & _CTYPE_R) != 0 ? 1 : -1);
+}
+
 #else /* not using inlines */
 
 __BEGIN_DECLS
@@ -135,6 +150,7 @@ int		__istype(__ct_rune_t, unsigned long);
 int		__isctype(__ct_rune_t, unsigned long);
 __ct_rune_t	__toupper(__ct_rune_t);
 __ct_rune_t	__tolower(__ct_rune_t);
+int		__wcwidth(__ct_rune_t);
 __END_DECLS
 #endif /* using inlines */
 
diff --git a/include/wchar.h b/include/wchar.h
index c4be1e5244ca..931a4088ef78 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -71,6 +71,7 @@
 #include <sys/_null.h>
 #include <sys/_types.h>
 #include <machine/_limits.h>
+#include <_ctype.h>
 
 #ifndef _MBSTATE_T_DECLARED
 typedef	__mbstate_t	mbstate_t;
@@ -206,6 +207,7 @@ unsigned long long
 #if __XSI_VISIBLE
 int	wcswidth(const wchar_t *, size_t);
 int	wcwidth(wchar_t);
+#define	wcwidth(_c)	__wcwidth(_c)
 #endif
 
 #if __BSD_VISIBLE
diff --git a/lib/libc/locale/wcwidth.c b/lib/libc/locale/wcwidth.c
index 9706430de888..f7dababfd796 100644
--- a/lib/libc/locale/wcwidth.c
+++ b/lib/libc/locale/wcwidth.c
@@ -43,21 +43,12 @@
 __FBSDID("$FreeBSD$");
 
 #include <wchar.h>
-#include <wctype.h>
 
-#define _CTYPE_SWM 0xe0000000L	/* Mask to get screen width data */
-#define _CTYPE_SWS 30 		/* Bits to shift to get width */
+#undef wcwidth
 
 int
 wcwidth(wchar_t wc)
 {
-	unsigned int x;
 
-	if (wc == L'\0')
-		return (0);
-
-	x = (unsigned int)__maskrune(wc, _CTYPE_SWM|_CTYPE_R);
-	if ((x & _CTYPE_SWM) != 0)
-		return ((x & _CTYPE_SWM) >> _CTYPE_SWS);
-	return ((x & _CTYPE_R) != 0 ? 1 : -1);
+	return (__wcwidth(wc));
 }