diff --git a/src/group_gui.cpp b/src/group_gui.cpp
index 039c14b6ee..d4b653f837 100644
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -970,7 +970,7 @@ public:
 				switch (index) {
 					case ADI_TEMPLATE_REPLACE: // TemplateReplace Window
 						if (vli.vtype == VEH_TRAIN) {
-							ShowTemplateReplaceWindow(this->unitnumber_digits);
+							ShowTemplateReplaceWindow();
 						}
 						break;
 					case ADI_REPLACE: // Replace window
diff --git a/src/tbtr_template_gui_main.cpp b/src/tbtr_template_gui_main.cpp
index 7cc168cd59..d8321eb1e2 100644
--- a/src/tbtr_template_gui_main.cpp
+++ b/src/tbtr_template_gui_main.cpp
@@ -190,7 +190,6 @@ class TemplateReplaceWindow : public Window {
 private:
 
 	GUIGroupList groups;          ///< List of groups
-	uint unitnumber_digits;
 
 	std::vector<int> indents; ///< Indentation levels
 
@@ -210,14 +209,11 @@ private:
 	bool editInProgress;
 
 public:
-	TemplateReplaceWindow(WindowDesc *wdesc, uint unitnumber_digits) : Window(wdesc)
+	TemplateReplaceWindow(WindowDesc *wdesc) : Window(wdesc)
 	{
 		// listing/sorting
 		templates.SetSortFuncs(this->template_sorter_funcs);
 
-		// From BaseVehicleListWindow
-		this->unitnumber_digits = unitnumber_digits;
-
 		this->sel_railtype = INVALID_RAILTYPE;
 
 		this->details_height = 10 * FONT_HEIGHT_NORMAL + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
@@ -811,7 +807,7 @@ public:
 	}
 };
 
-void ShowTemplateReplaceWindow(uint unitnumber_digits)
+void ShowTemplateReplaceWindow()
 {
-	new TemplateReplaceWindow(&_replace_rail_vehicle_desc, unitnumber_digits);
+	new TemplateReplaceWindow(&_replace_rail_vehicle_desc);
 }
diff --git a/src/tbtr_template_gui_main.h b/src/tbtr_template_gui_main.h
index 9ee849a2e2..f16cea9e24 100644
--- a/src/tbtr_template_gui_main.h
+++ b/src/tbtr_template_gui_main.h
@@ -21,6 +21,6 @@
 
 typedef GUIList<const Group*> GUIGroupList;
 
-void ShowTemplateReplaceWindow(uint);
+void ShowTemplateReplaceWindow();
 
 #endif
diff --git a/src/vehicle_gui.cpp b/src/vehicle_gui.cpp
index 8fc9257928..19627d07a4 100644
--- a/src/vehicle_gui.cpp
+++ b/src/vehicle_gui.cpp
@@ -2087,7 +2087,7 @@ public:
 						break;
 					case ADI_TEMPLATE_REPLACE:
 						if (vli.vtype == VEH_TRAIN) {
-							ShowTemplateReplaceWindow(this->unitnumber_digits);
+							ShowTemplateReplaceWindow();
 						}
 						break;
 					case ADI_SERVICE: // Send for servicing