diff --git a/diff.c b/diff.c
index 35e46dd968..ef94175163 100644
--- a/diff.c
+++ b/diff.c
@@ -5773,6 +5773,13 @@ void diff_free_filepair(struct diff_filepair *p)
 	free(p);
 }
 
+void diff_free_queue(struct diff_queue_struct *q)
+{
+	for (int i = 0; i < q->nr; i++)
+		diff_free_filepair(q->queue[i]);
+	free(q->queue);
+}
+
 const char *diff_aligned_abbrev(const struct object_id *oid, int len)
 {
 	int abblen;
diff --git a/diffcore.h b/diffcore.h
index badc2261c2..9b588a1ee1 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -162,6 +162,7 @@ struct diff_filepair *diff_queue(struct diff_queue_struct *,
 				 struct diff_filespec *,
 				 struct diff_filespec *);
 void diff_q(struct diff_queue_struct *, struct diff_filepair *);
+void diff_free_queue(struct diff_queue_struct *q);
 
 /* dir_rename_relevance: the reason we want rename information for a dir */
 enum dir_rename_relevance {
diff --git a/line-log.c b/line-log.c
index 51d93310a4..7a74daf2e8 100644
--- a/line-log.c
+++ b/line-log.c
@@ -1195,6 +1195,7 @@ static int process_ranges_ordinary_commit(struct rev_info *rev, struct commit *c
 	if (parent)
 		add_line_range(rev, parent, parent_range);
 	free_line_log_data(parent_range);
+	diff_free_queue(&queue);
 	return changed;
 }