diff --git a/copy/Makefile b/copy/Makefile
index d82da6d..d4416e2 100644
--- a/copy/Makefile
+++ b/copy/Makefile
@@ -11,7 +11,7 @@
 REMOVE = rm -f
 
 #Objects
-OBJS = main.o
+OBJS = main.o btree.o
 
 #Startup File
 STARTUP = #../../lib/ubix/startup.o