diff --git a/libraries/AP_Terrain/AP_Terrain.h b/libraries/AP_Terrain/AP_Terrain.h
index 4321afdd5d..a53dce5bab 100644
--- a/libraries/AP_Terrain/AP_Terrain.h
+++ b/libraries/AP_Terrain/AP_Terrain.h
@@ -103,6 +103,7 @@ public:
     void update(void);
 
     bool enabled() const { return enable; }
+    void set_enabled(bool _enable) { enable = _enable; }
 
     // return status enum for health reporting
     enum TerrainStatus status(void) const { return system_status; }