diff --git a/crates/hir/src/lib.rs b/crates/hir/src/lib.rs
index 6f621eb1225..944eca63543 100644
--- a/crates/hir/src/lib.rs
+++ b/crates/hir/src/lib.rs
@@ -2088,7 +2088,7 @@ impl From<hir_ty::Mutability> for Access {
     }
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone, PartialEq, Eq, Hash, Debug)]
 pub struct Param {
     func: Function,
     /// The index in parameter list, including self parameter.