diff --git a/libraries/AP_DDS/AP_DDS_Client.cpp b/libraries/AP_DDS/AP_DDS_Client.cpp
index f0d26027044755..1ae30067465be2 100644
--- a/libraries/AP_DDS/AP_DDS_Client.cpp
+++ b/libraries/AP_DDS/AP_DDS_Client.cpp
@@ -637,7 +637,7 @@ void AP_DDS_Client::main_loop(void)
             update();
 
             // check ping response
-            if (session.on_pong_flag == 1) {
+            if (session.on_pong_flag == PONG_IN_SESSION_STATUS) {
                 had_ping_reply = true;
             }