diff --git a/common/autoconf/spec.gmk.in b/common/autoconf/spec.gmk.in
index 706d5edcc59..8ddc28f53aa 100644
--- a/common/autoconf/spec.gmk.in
+++ b/common/autoconf/spec.gmk.in
@@ -578,7 +578,7 @@ SJAVAC_SERVER_JAVA=@FIXPATH@ @FIXPATH_DETACH_FLAG@ $(SJAVAC_SERVER_JAVA_CMD) \
 JAVAC_FLAGS?=@JAVAC_FLAGS@
 
 
-BUILD_JAVA_FLAGS:=-Xms64M -Xmx1100M
+BUILD_JAVA_FLAGS := @BOOTCYCLE_JVM_ARGS_BIG@
 BUILD_JAVA=@FIXPATH@ $(BUILD_JDK)/bin/java $(BUILD_JAVA_FLAGS)
 
 # Use ?= as this can be overridden from bootcycle-spec.gmk