diff --git a/ArduCopter/Log.cpp b/ArduCopter/Log.cpp
index 487684157f..353bb7da91 100644
--- a/ArduCopter/Log.cpp
+++ b/ArduCopter/Log.cpp
@@ -365,7 +365,7 @@ void Copter::Log_Write_Attitude()
  #endif
     DataFlash.Log_Write_AHRS2(ahrs);
 #if CONFIG_HAL_BOARD == HAL_BOARD_SITL
-    sitl.Log_Write_SIMSTATE(DataFlash);
+    sitl.Log_Write_SIMSTATE(&DataFlash);
 #endif
     DataFlash.Log_Write_POS(ahrs);
 }