diff --git a/libraries/SITL/SIM_AdNav.cpp b/libraries/SITL/SIM_AdNav.cpp
index 06e90dd67f2cf9..54238ff6ba067c 100644
--- a/libraries/SITL/SIM_AdNav.cpp
+++ b/libraries/SITL/SIM_AdNav.cpp
@@ -231,8 +231,8 @@ void AdNav::send_raw_gnss_pkt(){
 
     raw_gnss.unix_time_seconds = tv.tv_sec;
     raw_gnss.microseconds = tv.tv_usec;
-    raw_gnss.position[0] = radians(fdm.longitude);
-    raw_gnss.position[1] = radians(fdm.latitude);
+    raw_gnss.position[0] = radians(fdm.latitude);
+    raw_gnss.position[1] = radians(fdm.longitude);
     raw_gnss.position[2] = fdm.altitude;
     raw_gnss.velocity[0] = fdm.speedN;
     raw_gnss.velocity[1] = fdm.speedE;