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-rw-r--r--libio/libio.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/libio/libio.h b/libio/libio.h
index a807883856..643812f72b 100644
--- a/libio/libio.h
+++ b/libio/libio.h
@@ -143,6 +143,9 @@
 # define _IO_FLAGS2_FORTIFY 4
 #endif
 #define _IO_FLAGS2_USER_WBUF 8
+#ifdef _LIBC
+# define _IO_FLAGS2_SCANF_STD 16
+#endif
 
 /* These are "formatting flags" matching the iostream fmtflags enum values. */
 #define _IO_SKIPWS 01