diff --git a/Makefile b/Makefile
index 00991b7c12..672ea74233 100644
--- a/Makefile
+++ b/Makefile
@@ -358,6 +358,7 @@ LIB_H += list-objects.h
 LIB_H += ll-merge.h
 LIB_H += log-tree.h
 LIB_H += mailmap.h
+LIB_H += merge-recursive.h
 LIB_H += object.h
 LIB_H += pack.h
 LIB_H += pack-refs.h