diff --git a/libraries/AP_NavEKF/AP_NavEKF.cpp b/libraries/AP_NavEKF/AP_NavEKF.cpp
index b2ec385a67aa6ded3926a414eb4b6c55ab625eed..18b0b6cd33260a69176dc94dd025ada9625f974c 100644
--- a/libraries/AP_NavEKF/AP_NavEKF.cpp
+++ b/libraries/AP_NavEKF/AP_NavEKF.cpp
@@ -35,7 +35,7 @@
 #define GYRO_PNOISE_DEFAULT     0.015f
 #define ACC_PNOISE_DEFAULT      0.25f
 #define GBIAS_PNOISE_DEFAULT    1E-07f
-#define ABIAS_PNOISE_DEFAULT    0.00015f
+#define ABIAS_PNOISE_DEFAULT    0.0001f
 #define MAGE_PNOISE_DEFAULT     0.0003f
 #define MAGB_PNOISE_DEFAULT     0.0003f
 #define VEL_GATE_DEFAULT        2
@@ -56,7 +56,7 @@
 #define GYRO_PNOISE_DEFAULT     0.015f
 #define ACC_PNOISE_DEFAULT      0.25f
 #define GBIAS_PNOISE_DEFAULT    1E-07f
-#define ABIAS_PNOISE_DEFAULT    0.00015f
+#define ABIAS_PNOISE_DEFAULT    0.0001f
 #define MAGE_PNOISE_DEFAULT     0.0003f
 #define MAGB_PNOISE_DEFAULT     0.0003f
 #define VEL_GATE_DEFAULT        2
@@ -77,7 +77,7 @@
 #define GYRO_PNOISE_DEFAULT     0.015f
 #define ACC_PNOISE_DEFAULT      0.25f
 #define GBIAS_PNOISE_DEFAULT    1E-07f
-#define ABIAS_PNOISE_DEFAULT    0.00015f
+#define ABIAS_PNOISE_DEFAULT    0.0001f
 #define MAGE_PNOISE_DEFAULT     0.0003f
 #define MAGB_PNOISE_DEFAULT     0.0003f
 #define VEL_GATE_DEFAULT        3