diff -ur neko-1.8.1-orig/Makefile neko-1.8.1/Makefile
--- neko-1.8.1-orig/Makefile	2009-12-13 15:59:01.000000000 -0600
+++ neko-1.8.1/Makefile	2009-12-13 16:02:22.000000000 -0600
@@ -21,10 +21,10 @@
 #
 # OSX_UNIVERSAL = 1
 
-
 # For 64 bit
-#
-# CFLAGS += -D_64BITS
+ifeq (${CHOST},x86_64-pc-linux-gnu)
+	CFLAGS += -D_64BITS
+endif
 
 # For profiling VM
 #