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-rw-r--r--libio/oldiofopen.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libio/oldiofopen.c b/libio/oldiofopen.c
index d0ffb02b13..5dffae80f3 100644
--- a/libio/oldiofopen.c
+++ b/libio/oldiofopen.c
@@ -23,6 +23,7 @@
    other reasons why the executable file might be covered by the GNU
    General Public License.  */
 
+#define _IO_USE_OLD_IO_FILE
 #include "libioP.h"
 #ifdef __STDC__
 #include <stdlib.h>