diff --git a/Engine/source/console/torquescript/bison.bat b/Engine/source/console/torquescript/bison.bat
index ffdaf545d..275a99c72 100644
--- a/Engine/source/console/torquescript/bison.bat
+++ b/Engine/source/console/torquescript/bison.bat
@@ -1,6 +1,6 @@
 echo Changing to %4 ...
 cd %4
 echo Generating %2 and %3 with prefix %1.
-..\..\..\bin\bison-flex\win_bison.exe -o %2 %3 --defines -p %1
+..\..\..\bin\bison-flex\win_bison.exe -o %2 %3 --defines -p %1 -H
 echo Renaming %2 to %5 .
 move /Y %2 %5
\ No newline at end of file