diff --git a/src/effect/schema/Jsonifiable.ts b/src/effect/schema/Jsonifiable.ts
index 347190f..1d055a3 100644
--- a/src/effect/schema/Jsonifiable.ts
+++ b/src/effect/schema/Jsonifiable.ts
@@ -17,10 +17,12 @@ expectStruct(s2)
 
 export function Jsonifiable<
     A, I, R,
-    JsonifiableFields extends Schema.Struct.Fields
+    JsonifiableA extends I, JsonifiableI, JsonifiableR,
+    // JsonifiableFields extends Schema.Struct.Fields
 >(
     schema: Schema.Schema<A, I, R>,
-    jsonifiable: Schema.Struct<JsonifiableFields> & { readonly Type: I },
+    // jsonifiable: Schema.Struct<JsonifiableFields> & { readonly Type: I },
+    jsonifiable: Schema.Schema<JsonifiableA, JsonifiableI, JsonifiableR>
 ) {
-    return jsonifiable.pipe(schema)
+    return jsonifiable.pipe(Schema.compose(schema))
 }