1 files changed, 1 insertions, 1 deletions
diff --git a/tree.h b/tree.h
index 69bcb5e0ec..9dc90bac38 100644
--- a/tree.h
+++ b/tree.h
@@ -25,7 +25,7 @@ typedef int (*read_tree_fn_t)(const unsigned char *, const char *, int, const ch
 
 extern int read_tree_recursive(struct tree *tree,
 			       const char *base, int baselen,
-			       int stage, struct pathspec *pathspec,
+			       int stage, const struct pathspec *pathspec,
 			       read_tree_fn_t fn, void *context);
 
 extern int read_tree(struct tree *tree, int stage, struct pathspec *pathspec);