diff --git a/core-buffer/src/LiveRecvModule.cpp b/core-buffer/src/LiveRecvModule.cpp
index e222cf8..9540642 100644
--- a/core-buffer/src/LiveRecvModule.cpp
+++ b/core-buffer/src/LiveRecvModule.cpp
@@ -61,7 +61,7 @@ void* LiveRecvModule::connect_socket(size_t module_id)
         throw runtime_error(zmq_strerror(errno));
     }
 
-    if (zmq_setsockopt(sock, ZMQ_SUBSCRIBE, "", sizeof("")) != 0) {
+    if (zmq_setsockopt(sock, ZMQ_SUBSCRIBE, "", 0) != 0) {
         throw runtime_error(zmq_strerror(errno));
     }