diff -r 17f3ca06e39a -r 4fca8bcfaff0 hedgewars/hwengine.pas
--- a/hedgewars/hwengine.pas	Sat Jun 14 23:59:20 2014 +0200
+++ b/hedgewars/hwengine.pas	Sun Jun 15 00:02:25 2014 +0200
@@ -575,9 +575,9 @@
     // return 1 when engine is not called correctly
     if GameType = gmtSyntax then
         {$IFDEF PAS2C}
-        exit(1);
+        exit(HaltUsageError);
         {$ELSE}
-        halt(1);
+        halt(HaltUsageError);
         {$ENDIF}
 
 {$IFDEF HWLIBRARY}