diff --git a/src/m_Do/m_Do_machine.cpp b/src/m_Do/m_Do_machine.cpp
index 6b186a77e6..ca347523d1 100644
--- a/src/m_Do/m_Do_machine.cpp
+++ b/src/m_Do/m_Do_machine.cpp
@@ -859,7 +859,7 @@ int mDoMch_Create() {
 #endif
     archiveHeapSize *= 2;
     j2dHeapSize *= 2;
-    gameHeapSize *= 2;
+    gameHeapSize *= 20;
 #endif
 
     JFWSystem::setSysHeapSize(arenaSize);