diff --git a/core/combo/javac.mk b/core/combo/javac.mk
index cc2c872..8c24e4b 100644
--- a/core/combo/javac.mk
+++ b/core/combo/javac.mk
@@ -27,7 +27,7 @@
     COMMON_JAVAC := development/host/windows/prebuilt/javawrap.exe -J-Xmx256m \
         $(common_flags)
 else
-    COMMON_JAVAC := $(JAVACC) -J-Xmx512M $(common_flags)
+    COMMON_JAVAC := $(JAVACC) -J-Xmx768M $(common_flags)
 endif
 
 # Eclipse.