diff --git a/src/depot_gui.cpp b/src/depot_gui.cpp
--- a/src/depot_gui.cpp
+++ b/src/depot_gui.cpp
@@ -601,7 +601,7 @@ struct DepotWindow : Window {
 				uint min_height = 0;
 
 				if (this->type == VEH_TRAIN) {
-					SetDParamMaxValue(0, 1000);
+					SetDParamMaxValue(0, 1000, 0, FS_SMALL);
 					SetDParam(1, 1);
 					this->count_width = GetStringBoundingBox(STR_TINY_BLACK_DECIMAL).width + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
 				} else {