diff --git a/libraries/AP_Mount/SoloGimbalEKF.cpp b/libraries/AP_Mount/SoloGimbalEKF.cpp
index e646e331e0..16715b6024 100644
--- a/libraries/AP_Mount/SoloGimbalEKF.cpp
+++ b/libraries/AP_Mount/SoloGimbalEKF.cpp
@@ -41,7 +41,7 @@ SoloGimbalEKF::SoloGimbalEKF() :
 // complete reset
 void SoloGimbalEKF::reset()
 {
-    memset(&states,0,sizeof(states));
+    ZERO_FARRAY(states);
     memset((void *)&gSense,0,sizeof(gSense));
     memset(&Cov,0,sizeof(Cov));
     TiltCorrectionSquared = 0;