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-rw-r--r--bindings/c/zmq.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/bindings/c/zmq.h b/bindings/c/zmq.h
index 254971d..9eac38a 100644
--- a/bindings/c/zmq.h
+++ b/bindings/c/zmq.h
@@ -219,7 +219,7 @@ ZMQ_EXPORT int zmq_poll (zmq_pollitem_t *items, int nitems, long timeout);
// of this function is to make the code 100% portable, including where 0MQ
// compiled with certain CRT library (on Windows) is linked to an application
// compiled with different CRT library.
-int zmq_errno ();
+ZMQ_EXPORT int zmq_errno ();
////////////////////////////////////////////////////////////////////////////////
// Helper functions.