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-rw-r--r--ext/pty/pty.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/pty/pty.c b/ext/pty/pty.c
index cea0de50a2..01382e881a 100644
--- a/ext/pty/pty.c
+++ b/ext/pty/pty.c
@@ -24,6 +24,7 @@
#include "ruby.h"
#include "rubyio.h"
+#include "util.h"
#include <signal.h>
#ifdef HAVE_SYS_STROPTS_H