diff --git a/src/bin/mkindex.cpp b/src/bin/mkindex.cpp
index 0d8696bae3..c3cc31b918 100644
--- a/src/bin/mkindex.cpp
+++ b/src/bin/mkindex.cpp
@@ -70,6 +70,8 @@ copy_indexes(dev_t from, dev_t to, bool verbose)
 		} else if (verbose)
 			printf("\t%s\n", dirent->d_name);
 	}
+
+	fs_close_index_dir(indexes);
 }