diff --git a/libraries/AP_NavEKF/AP_NavEKF.cpp b/libraries/AP_NavEKF/AP_NavEKF.cpp
index 1a2d8c7523..9ca4d7bbf1 100644
--- a/libraries/AP_NavEKF/AP_NavEKF.cpp
+++ b/libraries/AP_NavEKF/AP_NavEKF.cpp
@@ -432,7 +432,8 @@ NavEKF::NavEKF(const AP_AHRS *ahrs, AP_Baro &baro, const RangeFinder &rng) :
     _perf_FuseVelPosNED(perf_alloc(PC_ELAPSED, "EKF_FuseVelPosNED")),
     _perf_FuseMagnetometer(perf_alloc(PC_ELAPSED, "EKF_FuseMagnetometer")),
     _perf_FuseAirspeed(perf_alloc(PC_ELAPSED, "EKF_FuseAirspeed")),
-    _perf_FuseSideslip(perf_alloc(PC_ELAPSED, "EKF_FuseSideslip"))
+    _perf_FuseSideslip(perf_alloc(PC_ELAPSED, "EKF_FuseSideslip")),
+    _perf_OpticalFlowEKF(perf_alloc(PC_ELAPSED, "EKF_FuseOptFlow"))
 #endif
 {
     AP_Param::setup_object_defaults(this, var_info);