diff --git a/builtin/checkout-index.c b/builtin/checkout-index.c
index a730f6a1aa..d92db62fbd 100644
--- a/builtin/checkout-index.c
+++ b/builtin/checkout-index.c
@@ -190,6 +190,7 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 
 	argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 			builtin_checkout_index_usage, 0);
+	state.istate = &the_index;
 	state.force = force;
 	state.quiet = quiet;
 	state.not_new = not_new;
diff --git a/entry.c b/entry.c
index b2381fd9f6..2a2ab6c839 100644
--- a/entry.c
+++ b/entry.c
@@ -266,7 +266,7 @@ static int write_entry(struct cache_entry *ce,
 	const struct submodule *sub;
 
 	if (ce_mode_s_ifmt == S_IFREG) {
-		struct stream_filter *filter = get_stream_filter(&the_index, ce->name,
+		struct stream_filter *filter = get_stream_filter(state->istate, ce->name,
 								 &ce->oid);
 		if (filter &&
 		    !streaming_write_entry(ce, path, filter,
@@ -314,14 +314,14 @@ static int write_entry(struct cache_entry *ce,
 		 * Convert from git internal format to working tree format
 		 */
 		if (dco && dco->state != CE_NO_DELAY) {
-			ret = async_convert_to_working_tree(&the_index, ce->name, new_blob,
+			ret = async_convert_to_working_tree(state->istate, ce->name, new_blob,
 							    size, &buf, dco);
 			if (ret && string_list_has_string(&dco->paths, ce->name)) {
 				free(new_blob);
 				goto delayed;
 			}
 		} else
-			ret = convert_to_working_tree(&the_index, ce->name, new_blob, size, &buf);
+			ret = convert_to_working_tree(state->istate, ce->name, new_blob, size, &buf);
 
 		if (ret) {
 			free(new_blob);
@@ -422,7 +422,8 @@ int checkout_entry(struct cache_entry *ce,
 
 	if (!check_path(path.buf, path.len, &st, state->base_dir_len)) {
 		const struct submodule *sub;
-		unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
+		unsigned changed = ie_match_stat(state->istate, ce, &st,
+						 CE_MATCH_IGNORE_VALID | CE_MATCH_IGNORE_SKIP_WORKTREE);
 		/*
 		 * Needs to be checked before !changed returns early,
 		 * as the possibly empty directory was not changed