diff --git a/config.c b/config.c
index 476cd73c9e..387c7282e9 100644
--- a/config.c
+++ b/config.c
@@ -2826,7 +2826,7 @@ int git_config_get_max_percent_split_change(void)
 	return -1; /* default value */
 }
 
-int git_config_get_index_threads(int *dest)
+int repo_config_get_index_threads(struct repository *r, int *dest)
 {
 	int is_bool, val;
 
@@ -2836,7 +2836,7 @@ int git_config_get_index_threads(int *dest)
 		return 0;
 	}
 
-	if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
+	if (!repo_config_get_bool_or_int(r, "index.threads", &is_bool, &val)) {
 		if (is_bool)
 			*dest = val ? 0 : 1;
 		else
diff --git a/config.h b/config.h
index 8eb3efa0c4..3f68b30047 100644
--- a/config.h
+++ b/config.h
@@ -710,7 +710,7 @@ int git_config_get_maybe_bool(const char *key, int *dest);
  */
 int git_config_get_pathname(const char *key, char **dest);
 
-int git_config_get_index_threads(int *dest);
+int repo_config_get_index_threads(struct repository *r, int *dest);
 int git_config_get_split_index(void);
 int git_config_get_max_percent_split_change(void);
 
diff --git a/read-cache.c b/read-cache.c
index 742369b295..ad09950153 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2267,7 +2267,7 @@ int do_read_index(struct index_state *istate, const char *path, int must_exist)
 
 	src_offset = sizeof(*hdr);
 
-	if (git_config_get_index_threads(&nr_threads))
+	if (repo_config_get_index_threads(the_repository, &nr_threads))
 		nr_threads = 1;
 
 	/* TODO: does creating more threads than cores help? */
@@ -2787,7 +2787,7 @@ static int record_eoie(void)
 	 * used for threading is written by default if the user
 	 * explicitly requested threaded index reads.
 	 */
-	return !git_config_get_index_threads(&val) && val != 1;
+	return !repo_config_get_index_threads(the_repository, &val) && val != 1;
 }
 
 static int record_ieot(void)
@@ -2802,7 +2802,7 @@ static int record_ieot(void)
 	 * written by default if the user explicitly requested
 	 * threaded index reads.
 	 */
-	return !git_config_get_index_threads(&val) && val != 1;
+	return !repo_config_get_index_threads(the_repository, &val) && val != 1;
 }
 
 enum write_extensions {
@@ -2875,7 +2875,7 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
 
 	hashwrite(f, &hdr, sizeof(hdr));
 
-	if (!HAVE_THREADS || git_config_get_index_threads(&nr_threads))
+	if (!HAVE_THREADS || repo_config_get_index_threads(the_repository, &nr_threads))
 		nr_threads = 1;
 
 	if (nr_threads != 1 && record_ieot()) {