--- a/js/src/config/Linux_All.mk
+++ b/js/src/config/Linux_All.mk
@@ -68,20 +68,20 @@ GCC_LIST:=$(sort 2.91.66 $(GCC_VERSION) 
 
 ifeq (2.91.66, $(firstword $(GCC_LIST)))
 CFLAGS+= -DGCC_OPT_BUG
 endif # gcc 2.91.66
 endif # gcc
 endif # 86
 endif # !x86_64
 
-#ifeq ($(CPU_ARCH),x86_64)
-#OS_CFLAGS += -DAVMPLUS_AMD64 -DAVMPLUS_64BIT -DAVMPLUS_LINUX
-#NANOJIT_ARCH = i386
-#endif
+ifeq ($(CPU_ARCH),x86_64)
+OS_CFLAGS += -DAVMPLUS_AMD64 -DAVMPLUS_64BIT -DAVMPLUS_LINUX
+NANOJIT_ARCH = i386
+endif
 
 ifeq ($(CPU_ARCH),arm)
 OS_CFLAGS += -DAVMPLUS_ARM -DAVMPLUS_LINUX
 NANOJIT_ARCH = ARM
 endif
 
 GFX_ARCH = x