diff --git a/ArduCopter/Log.pde b/ArduCopter/Log.pde
index 732ca7a172..4595f0ce7f 100644
--- a/ArduCopter/Log.pde
+++ b/ArduCopter/Log.pde
@@ -491,7 +491,11 @@ static void Log_Write_Attitude()
     DataFlash.WriteBlock(&pkt, sizeof(pkt));
 
 #if AP_AHRS_NAVEKF_AVAILABLE
+ #if OPTFLOW == ENABLED
     DataFlash.Log_Write_EKF(ahrs,optflow.enabled());
+ #else
+    DataFlash.Log_Write_EKF(ahrs,false);
+ #endif
     DataFlash.Log_Write_AHRS2(ahrs);
 #endif
 #if CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL