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-rw-r--r--builtin/diff-tree.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index a8e68ce8ef..0d3c611aac 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c
@@ -1,4 +1,3 @@
-#define USE_THE_INDEX_VARIABLE
#include "builtin.h"
#include "config.h"
#include "diff.h"
@@ -206,7 +205,7 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
opt->diffopt.rotate_to_strict = 0;
opt->diffopt.no_free = 1;
if (opt->diffopt.detect_rename) {
- if (!the_index.cache)
+ if (the_repository->index->cache)
repo_read_index(the_repository);
opt->diffopt.setup |= DIFF_SETUP_USE_SIZE_CACHE;
}