--- a/make/autoconf/boot-jdk.m4	Mon Apr 16 11:08:07 2018 +0200
+++ b/make/autoconf/boot-jdk.m4	Mon Apr 16 12:20:36 2018 +0200
@@ -405,7 +405,7 @@
   BOOTCYCLE_JVM_ARGS_BIG=-Xms64M
 
   # Maximum amount of heap memory and stack size.
-  JVM_HEAP_LIMIT_32="1024"
+  JVM_HEAP_LIMIT_32="768"
   # Running a 64 bit JVM allows for and requires a bigger heap
   JVM_HEAP_LIMIT_64="1600"
   STACK_SIZE_32=768