diff --git a/src/main.cpp b/src/main.cpp
index 8405dc4..8e496ad 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -107,10 +107,11 @@ int main(int argc, char **argv) {
 
         std::cout << "Result: " << result.out << std::endl;
 
-        // Send the job id and result.out to sink
-        zmq::message_t reply(JOB_ID_LEN + result.out.size());
+        // Send the job id, the exit code and result.out to sink
+        zmq::message_t reply(JOB_ID_LEN + sizeof(uint32_t) + result.out.size());
         memcpy(reply.data(), jobId.data(), JOB_ID_LEN);
-        memcpy(static_cast<char *>(reply.data()) + JOB_ID_LEN, result.out.data(), result.out.size());
+        sk::write_uint32(static_cast<char *>(reply.data()) + JOB_ID_LEN, result.exit_code);
+        memcpy(static_cast<char *>(reply.data()) + JOB_ID_LEN + sizeof(uint32_t), result.out.data(), result.out.size());
         sender.send(reply, zmq::send_flags::none);
     }
     return 0;
diff --git a/src/network.cpp b/src/network.cpp
index d5d3a0c..d567639 100644
--- a/src/network.cpp
+++ b/src/network.cpp
@@ -2,4 +2,10 @@
 
 namespace sk {
 uint32_t read_uint32(const char *buffer) { return static_cast<uint32_t>(buffer[3]) | static_cast<uint32_t>(buffer[2]) << 8 | static_cast<uint32_t>(buffer[1]) << 16 | static_cast<uint32_t>(buffer[0]) << 24; }
+void write_uint32(char *buffer, uint32_t value) {
+    buffer[0] = static_cast<char>(value >> 24);
+    buffer[1] = static_cast<char>(value >> 16);
+    buffer[2] = static_cast<char>(value >> 8);
+    buffer[3] = static_cast<char>(value);
+}
 }
diff --git a/src/network.hpp b/src/network.hpp
index db7ab6c..a577cef 100644
--- a/src/network.hpp
+++ b/src/network.hpp
@@ -4,4 +4,5 @@
 
 namespace sk {
 uint32_t read_uint32(const char *buffer);
+void write_uint32(char *buffer, uint32_t value);
 }