diff --git a/lib/roken/rkpty.c b/lib/roken/rkpty.c
index 78e877e6a..bff632f0f 100644
--- a/lib/roken/rkpty.c
+++ b/lib/roken/rkpty.c
@@ -48,6 +48,9 @@
 #ifdef HAVE_UTIL_H
 #include <util.h>
 #endif
+#ifdef HAVE_LIBUTIL_H
+#include <libutil.h>
+#endif
 
 #ifdef	STREAMSPTY
 #include <stropts.h>