diff --git a/src/common.rs b/src/common.rs
index 282dc579f0bd101f6a90f0ebe5173a768be39584..64de8c8bb1838be6eff9cab9b8d8880326a6f4de 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -53,11 +53,7 @@ pub trait ProtocolDescription: Sized {
 
     fn parse(pdl: &[u8]) -> Result<Self, String>;
     fn component_polarities(&self, identifier: &[u8]) -> Result<Vec<Polarity>, MainComponentErr>;
-    fn new_main_component(
-        &self,
-        identifier: &[u8],
-        ports: &[Key],
-    ) -> Result<Self::S, MainComponentErr>;
+    fn new_main_component(&self, identifier: &[u8], ports: &[Key]) -> Self::S;
 }
 
 pub trait ComponentState: Sized + Clone {