diff --git a/simulator/simulator/efifeatures.h b/simulator/simulator/efifeatures.h
index f8b8eccb7c..d793eb617f 100644
--- a/simulator/simulator/efifeatures.h
+++ b/simulator/simulator/efifeatures.h
@@ -149,3 +149,4 @@
 #define EFI_JOYSTICK FALSE
 
 #define EFI_LUA TRUE
+#define LUA_USER_HEAP 100000