diff --git a/ArduCopter/Log.pde b/ArduCopter/Log.pde
index cdfbbe8126..64b43bd7b4 100644
--- a/ArduCopter/Log.pde
+++ b/ArduCopter/Log.pde
@@ -250,8 +250,8 @@ static void Log_Read_GPS()
 	int8_t temp2 	= DataFlash.ReadByte();			// 2 sats
 	int32_t temp3 	= DataFlash.ReadLong();			// 3 lat
 	int32_t temp4 	= DataFlash.ReadLong();			// 4 lon
-	float temp5 	= DataFlash.ReadLong() / 100.0;	// 5 gps alt
-	float temp6 	= DataFlash.ReadLong() / 100.0;	// 6 sensor alt
+	float temp5 	= DataFlash.ReadLong() / 100.0;	// 5 sensor alt
+	float temp6 	= DataFlash.ReadLong() / 100.0;	// 6 gps alt
 	int16_t temp7 	= DataFlash.ReadInt();			// 7 ground speed
 	int32_t temp8 	= DataFlash.ReadLong();// 8 ground course