1 files changed, 1 insertions, 1 deletions

diff --git a/src/usr.bin/nc/atomicio.c b/src/usr.bin/nc/atomicio.c
index f404eeedd8..02289f0a2a 100644
--- a/src/usr.bin/nc/atomicio.c
+++ b/src/usr.bin/nc/atomicio.c
@@ -34,7 +34,7 @@
  */
 ssize_t
 atomicio(f, fd, _s, n)
-        ssize_t (*f) ();
+        ssize_t (*f) (int, void *, size_t);
         int fd;
         void *_s;
         size_t n;