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-rw-r--r--src/rail_gui.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
index bbab6bfda..f69ada958 100644
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -601,7 +601,7 @@ static void BuildRailToolbWndProc(Window *w, WindowEvent *e)
case WE_PLACE_DRAG: {
/* no dragging if you have pressed the convert button */
- if (_convert_signal_button && w->IsWidgetLowered(RTW_BUILD_SIGNALS)) return;
+ if (FindWindowById(WC_BUILD_SIGNAL, 0) != NULL && _convert_signal_button && w->IsWidgetLowered(RTW_BUILD_SIGNALS)) return;
VpSelectTilesWithMethod(e->we.place.pt.x, e->we.place.pt.y, e->we.place.select_method);
return;