diff --git a/ArduPlane/quadplane.cpp b/ArduPlane/quadplane.cpp
index da6ccab4f9..3a23caac8a 100644
--- a/ArduPlane/quadplane.cpp
+++ b/ArduPlane/quadplane.cpp
@@ -1678,7 +1678,7 @@ int8_t QuadPlane::forward_throttle_pct(void)
         return 0;
     }
 
-    float deltat = (AP_HAL::millis() - vel_forward.lastt_ms) * 0.001f;
+    float deltat = (AP_HAL::millis() - vel_forward.last_ms) * 0.001f;
     if (deltat > 1 || deltat < 0) {
         vel_forward.integrator = 0;
         deltat = 0.1;
@@ -1687,7 +1687,7 @@ int8_t QuadPlane::forward_throttle_pct(void)
         // run at 10Hz
         return vel_forward.last_pct;
     }
-    vel_forward.lastt_ms = AP_HAL::millis();
+    vel_forward.last_ms = AP_HAL::millis();
     
     // work out the desired speed in forward direction
     const Vector3f &desired_velocity_cms = pos_control->get_desired_velocity();
diff --git a/ArduPlane/quadplane.h b/ArduPlane/quadplane.h
index 379bbf6b18..1af4425f39 100644
--- a/ArduPlane/quadplane.h
+++ b/ArduPlane/quadplane.h
@@ -227,7 +227,7 @@ private:
     struct {
         AP_Float gain;
         float integrator;
-        uint32_t lastt_ms;
+        uint32_t last_ms;
         int8_t last_pct;
     } vel_forward;