diff --git a/threads/Makefile b/threads/Makefile
index 34c10aa4f508714da040e81389fa51e56ba2d97a..2020101d9b0a666a6162a6a849c0833cc61edfee 100644
--- a/threads/Makefile
+++ b/threads/Makefile
@@ -1 +1 @@
-include ../Makefile.kernel
+include ../Makefile.kernel