diff --git a/include/stdio.h b/include/stdio.h
index 52fb7f7951d..f7af47a1cf6 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -134,11 +134,14 @@ typedef	struct __sFILE {
 	fpos_t	_offset;	/* current lseek offset (see WARNING) */
 } FILE;
 
+#ifndef _STDSTREAM_DECLARED
 __BEGIN_DECLS
 extern FILE *__stdinp;
 extern FILE *__stdoutp;
 extern FILE *__stderrp;
 __END_DECLS
+#define	_STDSTREAM_DECLARED
+#endif
 
 #define	__SLBF	0x0001		/* line buffered */
 #define	__SNBF	0x0002		/* unbuffered */
diff --git a/include/wchar.h b/include/wchar.h
index b8bb90a14a4..5bfac56df5e 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -171,6 +171,18 @@ wchar_t	*wmemset(wchar_t *, wchar_t, size_t);
 int	wprintf(const wchar_t * __restrict, ...);
 int	wscanf(const wchar_t * __restrict, ...);
 
+#ifndef _STDSTREAM_DECLARED
+extern struct __sFILE *__stdinp;
+extern struct __sFILE *__stdoutp;
+extern struct __sFILE *__stderrp;
+#define	_STDSTREAM_DECLARED
+#endif
+
+#define	getwc(fp)	fgetwc(fp)
+#define	getwchar()	fgetwc(__stdinp)
+#define	putwc(wc, fp)	fputwc(x, fp)
+#define	putwchar(wc)	fputwc(wc, __stdoutp)
+
 #if __ISO_C_VISIBLE >= 1999
 int	vfwscanf(struct __sFILE * __restrict, const wchar_t * __restrict,
 	    __va_list);