1 files changed, 2 insertions, 0 deletions
diff --git a/src/queue.cpp b/src/queue.cpp
index 361df78..165e360 100644
--- a/src/queue.cpp
+++ b/src/queue.cpp
@@ -94,5 +94,7 @@ int zmq::queue (class socket_base_t *insocket_,
             has_response = false;
         }
     }
+
+    return 0;
 }