diff --git a/.changeset/soft-cows-sell.md b/.changeset/soft-cows-sell.md
new file mode 100644
index 0000000000..1912bc2ca1
--- /dev/null
+++ b/.changeset/soft-cows-sell.md
@@ -0,0 +1,5 @@
+---
+"@effect/schema": patch
+---
+
+Fix `transformOrFail` and `transformOrFailFrom` signatures in the exported `Class` interface by adding the missing `annotations` optional argument
diff --git a/packages/schema/src/Schema.ts b/packages/schema/src/Schema.ts
index 6d5e391552..4c88414c7b 100644
--- a/packages/schema/src/Schema.ts
+++ b/packages/schema/src/Schema.ts
@@ -6249,7 +6249,8 @@ export interface Class<Self, Fields extends Struct.Fields, A, I, R, C, Inherited
         options: ParseOptions,
         ast: AST.Transformation
       ) => Effect.Effect<A, ParseResult.ParseIssue, R3>
-    }
+    },
+    annotations?: Annotations.Schema<Transformed>
   ) => [Transformed] extends [never] ? MissingSelfGeneric<"Base.transform">
     : Class<
       Transformed,
@@ -6279,7 +6280,8 @@ export interface Class<Self, Fields extends Struct.Fields, A, I, R, C, Inherited
         options: ParseOptions,
         ast: AST.Transformation
       ) => Effect.Effect<I, ParseResult.ParseIssue, R3>
-    }
+    },
+    annotations?: Annotations.Schema<Transformed>
   ) => [Transformed] extends [never] ? MissingSelfGeneric<"Base.transformFrom">
     : Class<
       Transformed,