diff --git a/image_pusher/ZMQStream2PusherSocket.cpp b/image_pusher/ZMQStream2PusherSocket.cpp
index 2b9334a97..64475b649 100644
--- a/image_pusher/ZMQStream2PusherSocket.cpp
+++ b/image_pusher/ZMQStream2PusherSocket.cpp
@@ -3,6 +3,8 @@
 
 #include "ZMQStream2PusherSocket.h"
 
+#include <spdlog/spdlog.h>
+
 void zmq_socket_free(void *data, void *hint) {
     auto z = (ZeroCopyReturnValue *) hint;
     z->release();
@@ -56,6 +58,10 @@ void ZMQStream2PusherSocket::WriterThread() {
         // When hitting timeout on SendZeroCopy consider it a transmission error and switch to non-blocking communication
         bool blocking_send = !transmission_error;
         if (!s.SendZeroCopy(e.z->GetImage(), e.z->GetImageSize(), zmq_socket_free, e.z, blocking_send)) {
+            if (!transmission_error)
+                spdlog::warn("ZeroMQ image socket {}: send blocked for over a second - image {} dropped, and "
+                             "images that find the queue full are dropped for the rest of the run",
+                             s.GetEndpointName(), e.z->GetImageNumber());
             transmission_error = true;
             // The slot is already released: on a failed send SendZeroCopy closes the message, and
             // closing a zmq_msg_init_data message runs its free function (zmq_socket_free).