diff --git a/ant.spec b/ant.spec
index 75bb569..79ba9ac 100644
--- a/ant.spec
+++ b/ant.spec
@@ -356,7 +356,7 @@ export JAVA_HOME
 sh build.sh --noconfig jars javadocs
 
 # BC-compile the two core jars
-gcj-dbtool -n build/lib/%{name}-%{version}.db
+gcj-dbtool -n build/lib/%{name}-%{version}.db 1024
 for jar in %{name} %{name}-launcher; do
     aot-compile \
         build/lib/$jar.jar \