diff --git a/src/system/libroot/posix/glibc/libio/Jamfile b/src/system/libroot/posix/glibc/libio/Jamfile
index 17d6807de3..8b8fb9032d 100644
--- a/src/system/libroot/posix/glibc/libio/Jamfile
+++ b/src/system/libroot/posix/glibc/libio/Jamfile
@@ -88,7 +88,7 @@ MergeObject posix_gnu_libio.o :
 	vasprintf.c
 	vscanf.c
 	vsnprintf.c
-	wfile_stubs.c
+#	wfile_stubs.c
 
 	# wide character
 
@@ -115,8 +115,8 @@ MergeObject posix_gnu_libio.o :
 	vswprintf.c
 	vwprintf.c
 #	vwscanf.c
-#	wfiledoalloc.c
-#	wfileops.c
+	wfiledoalloc.c
+	wfileops.c
 	wgenops.c
 	wprintf.c
 #	wscanf.c
diff --git a/src/system/libroot/posix/glibc/libio/wfileops.c b/src/system/libroot/posix/glibc/libio/wfileops.c
index 38f6ab256e..c5ed49a528 100644
--- a/src/system/libroot/posix/glibc/libio/wfileops.c
+++ b/src/system/libroot/posix/glibc/libio/wfileops.c
@@ -292,6 +292,7 @@ _IO_wfile_underflow (fp)
 INTDEF(_IO_wfile_underflow)
 
 
+#ifdef HAVE_MMAP
 static wint_t
 _IO_wfile_underflow_mmap (_IO_FILE *fp)
 {
@@ -365,6 +366,7 @@ _IO_wfile_underflow_maybe_mmap (_IO_FILE *fp)
 
   return _IO_WUNDERFLOW (fp);
 }
+#endif
 
 
 wint_t
@@ -882,6 +884,7 @@ struct _IO_jump_t _IO_wfile_jumps =
 INTVARDEF(_IO_wfile_jumps)
 
 
+#ifdef HAVE_MMAP
 struct _IO_jump_t _IO_wfile_jumps_mmap =
 {
   JUMP_INIT_DUMMY,
@@ -929,3 +932,4 @@ struct _IO_jump_t _IO_wfile_jumps_maybe_mmap =
   JUMP_INIT(showmanyc, _IO_default_showmanyc),
   JUMP_INIT(imbue, _IO_default_imbue)
 };
+#endif