diff --git a/src/generators.rs b/src/generators.rs
index fda85a9..5bd2a5e 100644
--- a/src/generators.rs
+++ b/src/generators.rs
@@ -50,15 +50,7 @@ where
 /// vertices and edges. This graph is also the Kneser graph *KG(5, 2)*.
 ///
 /// [Petersen graph]: https://en.wikipedia.org/wiki/Petersen_graph
-pub fn petersen<G>(
-    graph: &mut G,
-) -> (
-    [<G as GraphTopology>::Vertex; 10],
-    [<G as GraphTopology>::Edge; 15],
-)
-where
-    G: GraphTopologyAddition,
-{
+pub fn petersen<G: GraphTopologyAddition>(graph: &mut G) -> ([G::Vertex; 10], [G::Edge; 15]) {
     const N: usize = 5;
     const K: usize = 2;