diff --git a/libraries/AC_WPNav/AC_WPNav.cpp b/libraries/AC_WPNav/AC_WPNav.cpp
index 6257b688f2..54496e61aa 100644
--- a/libraries/AC_WPNav/AC_WPNav.cpp
+++ b/libraries/AC_WPNav/AC_WPNav.cpp
@@ -70,7 +70,7 @@ const AP_Param::GroupInfo AC_WPNav::var_info[] = {
     // @Param: JERK
     // @DisplayName: Waypoint Jerk
     // @Description: Defines the horizontal jerk in m/s/s used during missions
-    // @Units: m/s/s
+    // @Units: m/s/s/s
     // @Range: 1 20
     // @User: Standard
     AP_GROUPINFO("JERK",   11, AC_WPNav, _wp_jerk, 1.0f),