diff --git a/builtin/rev-list.c b/builtin/rev-list.c
index 77803727e0..97d077a994 100644
--- a/builtin/rev-list.c
+++ b/builtin/rev-list.c
@@ -508,6 +508,8 @@ static int try_bitmap_disk_usage(struct rev_info *revs,
 
 	size_from_bitmap = get_disk_usage_from_bitmap(bitmap_git, revs);
 	print_disk_usage(size_from_bitmap);
+
+	free_bitmap_index(bitmap_git);
 	return 0;
 }
 
diff --git a/t/t6115-rev-list-du.sh b/t/t6115-rev-list-du.sh
index c0cfda62fa..21c4a211b1 100755
--- a/t/t6115-rev-list-du.sh
+++ b/t/t6115-rev-list-du.sh
@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='basic tests of rev-list --disk-usage'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 # we want a mix of reachable and unreachable, as well as