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-rw-r--r--include/zmq.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/zmq.h b/include/zmq.h
index e6fc45c..09ed89c 100644
--- a/include/zmq.h
+++ b/include/zmq.h
@@ -170,6 +170,7 @@ ZMQ_EXPORT int zmq_term (void *context);
/* Socket options. */
#define ZMQ_AFFINITY 4
+#define ZMQ_IDENTITY 5
#define ZMQ_SUBSCRIBE 6
#define ZMQ_UNSUBSCRIBE 7
#define ZMQ_RATE 8