1 files changed, 1 insertions, 1 deletions
diff --git a/src/nng.h b/src/nng.h
index a5b3346a..049651c1 100644
--- a/src/nng.h
+++ b/src/nng.h
@@ -334,7 +334,7 @@ NNG_DECL void nng_aio_set_timeout(nng_aio *, nng_duration);
 // itself is copied. Data members (the memory regions referenced) *may* be
 // copied as well, depending on the operation.  This operation is guaranteed
 // to succeed if n <= 4, otherwise it may fail due to NNG_ENOMEM.
-NNG_DECL int nng_aio_set_iov(nng_aio *, int, nng_iov *);
+NNG_DECL int nng_aio_set_iov(nng_aio *, unsigned, const nng_iov *);
 
 // Message API.
 NNG_DECL int   nng_msg_alloc(nng_msg **, size_t);