diff --git a/libraries/AP_Terrain/AP_Terrain.cpp b/libraries/AP_Terrain/AP_Terrain.cpp
index fcc5e71848faa..9cf721383f24a 100644
--- a/libraries/AP_Terrain/AP_Terrain.cpp
+++ b/libraries/AP_Terrain/AP_Terrain.cpp
@@ -75,7 +75,7 @@ const AP_Param::GroupInfo AP_Terrain::var_info[] = {
     // @Units: m
     // @Range: 0 50
     // @User: Advanced
-    AP_GROUPINFO("OFS_MAX",  4, AP_Terrain, offset_max, 15),
+    AP_GROUPINFO("OFS_MAX",  4, AP_Terrain, offset_max, 30),
     
     AP_GROUPEND
 };