diff --git a/src/terraform_gui.cpp b/src/terraform_gui.cpp
index 133c71b8f7..0f51453714 100644
--- a/src/terraform_gui.cpp
+++ b/src/terraform_gui.cpp
@@ -264,7 +264,7 @@ struct TerraformToolbarWindow : Window {
 				break;
 
 			case WID_TT_MEASUREMENT_TOOL:
-				HandlePlacePushButton(this, WID_TT_MEASUREMENT_TOOL, SPR_CURSOR_QUERY, HT_RECT);
+				HandlePlacePushButton(this, WID_TT_MEASUREMENT_TOOL, SPR_CURSOR_QUERY, HT_RECT | HT_MAP);
 				this->last_user_action = widget;
 				break;