diff -r 9bc423363f6a -r bf9cc84b889d src/group_gui.cpp
--- a/src/group_gui.cpp	Sat Apr 05 10:55:50 2008 +0000
+++ b/src/group_gui.cpp	Sat Apr 05 11:27:50 2008 +0000
@@ -575,6 +575,7 @@
 
 					if (v->IsValid()) {
 						SetObjectToPlaceWnd(v->GetImage(DIR_W), GetVehiclePalette(v), VHM_DRAG, w);
+						_cursor.vehchain = true;
 					}
 
 					SetWindowDirty(w);
@@ -687,6 +688,7 @@
 					break;
 				}
 			}
+			_cursor.vehchain = false;
 			break;
 		}