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-rw-r--r--lib/libc/gen/unvis.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/libc/gen/unvis.c b/lib/libc/gen/unvis.c
index 6e81276..df6b18f 100644
--- a/lib/libc/gen/unvis.c
+++ b/lib/libc/gen/unvis.c
@@ -38,6 +38,7 @@ static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/4/93";
__FBSDID("$FreeBSD$");
#include <sys/types.h>
+#include <ctype.h>
#include <vis.h>
/*
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