diff --git a/libraries/AC_PrecLand/AC_PrecLand.cpp b/libraries/AC_PrecLand/AC_PrecLand.cpp
index 85e9114e95..4b715ad906 100644
--- a/libraries/AC_PrecLand/AC_PrecLand.cpp
+++ b/libraries/AC_PrecLand/AC_PrecLand.cpp
@@ -29,7 +29,7 @@ const AP_Param::GroupInfo AC_PrecLand::var_info[] = {
     // @Range: 0 360
     // @Increment: 1
     // @User: Advanced
-    // @Units: Centi-degrees
+    // @Units: cdeg
     AP_GROUPINFO("YAW_ALIGN",    2, AC_PrecLand, _yaw_align, 0),
 
     // @Param: LAND_OFS_X
@@ -38,7 +38,7 @@ const AP_Param::GroupInfo AC_PrecLand::var_info[] = {
     // @Range: -20 20
     // @Increment: 1
     // @User: Advanced
-    // @Units: Centimeters
+    // @Units: cm
     AP_GROUPINFO("LAND_OFS_X",    3, AC_PrecLand, _land_ofs_cm_x, 0),
 
     // @Param: LAND_OFS_Y
@@ -47,7 +47,7 @@ const AP_Param::GroupInfo AC_PrecLand::var_info[] = {
     // @Range: -20 20
     // @Increment: 1
     // @User: Advanced
-    // @Units: Centimeters
+    // @Units: cm
     AP_GROUPINFO("LAND_OFS_Y",    4, AC_PrecLand, _land_ofs_cm_y, 0),
 
     // @Param: EST_TYPE