diff --git a/repo-settings.c b/repo-settings.c
index 05546db98e..a703e407a3 100644
--- a/repo-settings.c
+++ b/repo-settings.c
@@ -22,7 +22,7 @@ void prepare_repo_settings(struct repository *r)
 	UPDATE_DEFAULT_BOOL(r->settings.core_commit_graph, 1);
 	UPDATE_DEFAULT_BOOL(r->settings.gc_write_commit_graph, 1);
 
-	if (!repo_config_get_bool(r, "index.version", &value))
+	if (!repo_config_get_int(r, "index.version", &value))
 		r->settings.index_version = value;
 	if (!repo_config_get_maybe_bool(r, "core.untrackedcache", &value)) {
 		if (value == 0)
diff --git a/t/t1600-index.sh b/t/t1600-index.sh
index c77721b580..b7c31aa86a 100755
--- a/t/t1600-index.sh
+++ b/t/t1600-index.sh
@@ -87,6 +87,10 @@ test_index_version () {
 }
 
 test_expect_success 'index version config precedence' '
+	test_index_version 0 false 0 2 &&
+	test_index_version 2 false 0 2 &&
+	test_index_version 3 false 0 2 &&
+	test_index_version 4 false 0 4 &&
 	test_index_version 2 false 4 4 &&
 	test_index_version 2 true 0 2 &&
 	test_index_version 0 true 0 4 &&