diff --git a/tools/udplogserver/main.cpp b/tools/udplogserver/main.cpp
index 0368950..fdec456 100644
--- a/tools/udplogserver/main.cpp
+++ b/tools/udplogserver/main.cpp
@@ -91,6 +91,7 @@ int main(int argc, char **argv)
          if (recvd > 0) {
             buffer[recvd] = 0;
             std::cout << buffer;
+            std::cout.flush();
          }
       }
    }