diff --git a/src/build_vehicle_gui.cpp b/src/build_vehicle_gui.cpp
--- a/src/build_vehicle_gui.cpp
+++ b/src/build_vehicle_gui.cpp
@@ -156,7 +156,7 @@ static bool EngineNameSorter(const GUIEn
 		GetString(last_name[1], STR_ENGINE_NAME, lastof(last_name[1]));
 	}
 
-	int r = strnatcmp(last_name[0], last_name[1]); // Sort by name (natural sorting).
+	int r = StrNaturalCompare(last_name[0], last_name[1]); // Sort by name (natural sorting).
 
 	/* Use EngineID to sort instead since we want consistent sorting */
 	if (r == 0) return EngineNumberSorter(a, b);