diff --git a/builtin/fetch.c b/builtin/fetch.c
index 863c858fde..0c15f347af 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -1867,15 +1867,13 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 	prepare_repo_settings(the_repository);
 	if (the_repository->settings.fetch_write_commit_graph) {
 		int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
-		struct split_commit_graph_opts split_opts;
-		memset(&split_opts, 0, sizeof(struct split_commit_graph_opts));
 
 		if (progress)
 			commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 
 		write_commit_graph_reachable(get_object_directory(),
 					     commit_graph_flags,
-					     &split_opts);
+					     NULL);
 	}
 
 	close_object_store(the_repository->objects);
diff --git a/commit-graph.c b/commit-graph.c
index 0aea7b2ae5..baa1a266b4 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -1545,7 +1545,9 @@ static void split_graph_merge_strategy(struct write_commit_graph_context *ctx)
 
 	if (ctx->split_opts) {
 		max_commits = ctx->split_opts->max_commits;
-		size_mult = ctx->split_opts->size_multiple;
+
+		if (ctx->split_opts->size_multiple)
+			size_mult = ctx->split_opts->size_multiple;
 	}
 
 	g = ctx->r->objects->commit_graph;