1 files changed, 7 insertions, 2 deletions
diff --git a/refs.c b/refs.c
index 22000798c7..b34969c792 100644
--- a/refs.c
+++ b/refs.c
@@ -2303,8 +2303,13 @@ cleanup:
 	return ret;
 }
 
-int ref_update_reject_duplicates(struct string_list *refnames,
-				 struct strbuf *err)
+/*
+ * Write an error to `err` and return a nonzero value iff the same
+ * refname appears multiple times in `refnames`. `refnames` must be
+ * sorted on entry to this function.
+ */
+static int ref_update_reject_duplicates(struct string_list *refnames,
+					struct strbuf *err)
 {
 	size_t i, n = refnames->nr;