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-rw-r--r--bindings/c/zmq.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/bindings/c/zmq.h b/bindings/c/zmq.h
index bda6c01..7d3544e 100644
--- a/bindings/c/zmq.h
+++ b/bindings/c/zmq.h
@@ -69,6 +69,9 @@ extern "C" {
#ifndef ECONNREFUSED
#define ECONNREFUSED (ZMQ_HAUSNUMERO + 7)
#endif
+#ifndef EINPROGRESS
+#define EINPROGRESS (ZMQ_HAUSNUMERO + 8)
+#endif
// Native 0MQ error codes.
#define EMTHREAD (ZMQ_HAUSNUMERO + 50)