diff --git a/libraries/DataFlash/LogFile.cpp b/libraries/DataFlash/LogFile.cpp
index ea5f71d0dd8af79f7f7c6fed72611cb4d985834e..89de3e4a6ea4ce843e56762a8707834b42abfe8f 100644
--- a/libraries/DataFlash/LogFile.cpp
+++ b/libraries/DataFlash/LogFile.cpp
@@ -930,7 +930,7 @@ void DataFlash_Class::Log_Write_EKF(AP_AHRS_NavEKF &ahrs)
         LOG_PACKET_HEADER_INIT(LOG_EKF2_MSG),
         time_ms : hal.scheduler->millis(),
         Ratio   : (int8_t)(100*ratio),
-        AZ1bias : (int8_t)(100*az2bias),
+        AZ1bias : (int8_t)(100*az1bias),
         AZ2bias : (int8_t)(100*az2bias),
         windN   : (int16_t)(100*wind.x),
         windE   : (int16_t)(100*wind.y),