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-rw-r--r--troff/nii.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/troff/nii.c b/troff/nii.c
index 389fde83866d..56de498e989c 100644
--- a/troff/nii.c
+++ b/troff/nii.c
@@ -46,6 +46,8 @@
* contributors.
*/
+#include <sys/types.h>
+
#include "tdef.h"
#ifdef NROFF
#include "tw.h"