diff --git a/src/system/libroot/posix/glibc/libio/Jamfile b/src/system/libroot/posix/glibc/libio/Jamfile
index 4ccaa41ef6..d8f2fcfd32 100644
--- a/src/system/libroot/posix/glibc/libio/Jamfile
+++ b/src/system/libroot/posix/glibc/libio/Jamfile
@@ -40,7 +40,7 @@ KernelMergeObject posix_gnu_libio.o :
 	<$(SOURCE_GRIST)>iofclose.c
 	<$(SOURCE_GRIST)>iofdopen.c
 	<$(SOURCE_GRIST)>iofflush.c
-#	<$(SOURCE_GRIST)>iofgetpos.c
+	<$(SOURCE_GRIST)>iofgetpos.c
 	<$(SOURCE_GRIST)>iofgets.c
 	<$(SOURCE_GRIST)>iofgets_u.c
 	<$(SOURCE_GRIST)>iofopen.c
@@ -48,7 +48,7 @@ KernelMergeObject posix_gnu_libio.o :
 	<$(SOURCE_GRIST)>iofputs_u.c
 	<$(SOURCE_GRIST)>iofread.c
 	<$(SOURCE_GRIST)>iofread_u.c
-#	<$(SOURCE_GRIST)>iofsetpos.c
+	<$(SOURCE_GRIST)>iofsetpos.c
 	<$(SOURCE_GRIST)>ioftell.c
 	<$(SOURCE_GRIST)>iofwrite.c
 	<$(SOURCE_GRIST)>iofwrite_u.c
diff --git a/src/system/libroot/posix/glibc/libio/_G_config.h b/src/system/libroot/posix/glibc/libio/_G_config.h
index f12735951c..9149391f8d 100644
--- a/src/system/libroot/posix/glibc/libio/_G_config.h
+++ b/src/system/libroot/posix/glibc/libio/_G_config.h
@@ -26,7 +26,7 @@
 #	include <stddef.h>
 #endif
 
-//#include <wchar.h>
+#include <wchar.h>
 
 #ifndef _WINT_T
 /* Integral type unchanged by default argument promotions that can
diff --git a/src/system/libroot/posix/glibc/libio/libio.h b/src/system/libroot/posix/glibc/libio/libio.h
index 463a45ec55..a770188af1 100644
--- a/src/system/libroot/posix/glibc/libio/libio.h
+++ b/src/system/libroot/posix/glibc/libio/libio.h
@@ -46,6 +46,7 @@
 #define _IO_BUFSIZ _G_BUFSIZ
 #define _IO_va_list _G_va_list
 #define _IO_wint_t _G_wint_t
+#define __mbstate_t __c_mbstate_t
 
 #ifdef _G_NEED_STDARG_H
 /* This define avoids name pollution if we're using GNU stdarg.h */