diff --git a/libraries/GCS_MAVLink/GCS_MAVLink.h b/libraries/GCS_MAVLink/GCS_MAVLink.h
index 5e96703d77..f39c9a9f36 100644
--- a/libraries/GCS_MAVLink/GCS_MAVLink.h
+++ b/libraries/GCS_MAVLink/GCS_MAVLink.h
@@ -29,7 +29,10 @@
  */
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wcast-align"
+
+#if defined(__GNUC__) && __GNUC__ >= 9
 #pragma GCC diagnostic ignored "-Waddress-of-packed-member"
+#endif
 
 #include "include/mavlink/v2.0/ardupilotmega/version.h"