diff --git a/crazyflie/src/crazyflie_server.cpp b/crazyflie/src/crazyflie_server.cpp
index bfcefafac..374aad419 100644
--- a/crazyflie/src/crazyflie_server.cpp
+++ b/crazyflie/src/crazyflie_server.cpp
@@ -744,7 +744,7 @@ class CrazyflieROS
       if (deltaRxBc < 0) {
         deltaRxBc += std::numeric_limits<uint16_t>::max();
       }
-      if (deltaRxUc) {
+      if (deltaRxUc < 0) {
         deltaRxUc += std::numeric_limits<uint16_t>::max();
       }
       msg.num_rx_broadcast = deltaRxBc;