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-rw-r--r--misc/getttyent.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/misc/getttyent.c b/misc/getttyent.c
index e886e58b8e..dc4b9fadcb 100644
--- a/misc/getttyent.c
+++ b/misc/getttyent.c
@@ -40,6 +40,11 @@ static char sccsid[] = "@(#)getttyent.c	8.1 (Berkeley) 6/4/93";
 #include <ctype.h>
 #include <string.h>
 
+#ifdef USE_IN_LIBIO
+# define flockfile(s) _IO_flockfile (s)
+# define funlockfile(s) _IO_funlockfile (s)
+#endif
+
 static char zapchar;
 static FILE *tf;