diff --git a/src/cluster.c b/src/cluster.c
index 8dd3b89..2aeb8cd 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -56,7 +56,8 @@ void hexagram_cluster_init(hexagram_cluster *cluster,
     memset(&cluster->state, '\0', sizeof(cluster->state));
 }
 
-hexagram_cluster *hexagram_cluster_new(double width, double height) {
+hexagram_cluster *hexagram_cluster_new(double width,
+                                       double height) {
     hexagram_cluster *cluster;
 
     if ((cluster = malloc(sizeof(*cluster))) == NULL) {