diff --git a/scripts/dtc/fstree.c b/scripts/dtc/fstree.c
index 766b269..8fe1bdf 100644
--- a/scripts/dtc/fstree.c
+++ b/scripts/dtc/fstree.c
@@ -77,6 +77,7 @@
 		free(tmpnam);
 	}
 
+	closedir(d);
 	return tree;
 }