Index: /applications/editors/josm/nsis/launch4j.xml
===================================================================
--- /applications/editors/josm/nsis/launch4j.xml	(revision 10543)
+++ /applications/editors/josm/nsis/launch4j.xml	(revision 10544)
@@ -18,6 +18,6 @@
     <maxVersion></maxVersion>
     <dontUsePrivateJres>false</dontUsePrivateJres>
-    <initialHeapSize>0</initialHeapSize>
-    <maxHeapSize>0</maxHeapSize>
+    <initialHeapSize>16</initialHeapSize>
+    <maxHeapSize>256</maxHeapSize>
   </jre>
 </launch4jConfig>