diff --git a/ArduPlane/quadplane.cpp b/ArduPlane/quadplane.cpp
index b879a0a95a..861068f936 100644
--- a/ArduPlane/quadplane.cpp
+++ b/ArduPlane/quadplane.cpp
@@ -337,7 +337,7 @@ const AP_Param::GroupInfo QuadPlane::var_info2[] = {
 
     // @Param: TRIM_PITCH
     // @DisplayName: Quadplane AHRS trim pitch
-    // @Description: This sets the compensation for the pitch angle trim difference between forward and vertical flight pitch, NOTE! this is relative to forward flight trim not mounting locaiton. For tailsitters this is relative to a baseline of 90 degrees.
+    // @Description: This sets the compensation for the pitch angle trim difference between calibrated AHRS level and vertical flight pitch. NOTE! this is relative to calibrated AHRS trim, not forward flight trim which includes TRIM_PITCH_CD. For tailsitters, this is relative to a baseline of 90 degrees in AHRS.
     // @Units: deg
     // @Range: -10 +10
     // @Increment: 0.1