diff --git a/docs/org.eclipse.jst.doc.isv/javadoc.xml b/docs/org.eclipse.jst.doc.isv/javadoc.xml
index bd07377204f06dd2caf645960bde57be41776c25..1b915f81717130f4b9cb417760703a558de5c07d 100644
--- a/docs/org.eclipse.jst.doc.isv/javadoc.xml
+++ b/docs/org.eclipse.jst.doc.isv/javadoc.xml
@@ -44,7 +44,7 @@
         </copy>
         <javadoc
             executable="${env.JAVADOC_COMMAND}"
-        	  maxmemory="512m"
+        	  maxmemory="1024m"
             access="public"
             author="false"
             destdir="${outputDir}/reference/api"