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-rw-r--r--stdio-common/scanf15.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/stdio-common/scanf15.c b/stdio-common/scanf15.c
index 851466b3a9..a3ab15dea2 100644
--- a/stdio-common/scanf15.c
+++ b/stdio-common/scanf15.c
@@ -1,6 +1,7 @@
#undef _GNU_SOURCE
#define _XOPEN_SOURCE 600
#undef _LIBC
+#undef _IO_MTSAFE_IO
/* The following macro definitions are a hack. They word around disabling
the GNU extension while still using a few internal headers. */
#define u_char unsigned char