diff --git a/Makefile b/Makefile
index b21d2f1417..3031be5ee6 100644
--- a/Makefile
+++ b/Makefile
@@ -576,6 +576,7 @@ LIB_H += streaming.h
 LIB_H += string-list.h
 LIB_H += submodule.h
 LIB_H += tag.h
+LIB_H += thread-utils.h
 LIB_H += transport.h
 LIB_H += tree.h
 LIB_H += tree-walk.h