diff --git a/src/ZodSchemaClass.ts b/src/ZodSchemaClass.ts
index 2791794..94b84e5 100644
--- a/src/ZodSchemaClass.ts
+++ b/src/ZodSchemaClass.ts
@@ -11,23 +11,14 @@ class ZodSchemaObjectConstructor<Values> {
 
 
 export function ZodSchemaClass<
-    SchemaT                         extends z.ZodRawShape,
-    SchemaCatchall                  extends z.ZodTypeAny,
-    SchemaWithDefaultValuesT        extends z.ZodRawShape,
-    SchemaWithDefaultValuesCatchall extends z.ZodTypeAny,
-
-    Values                          extends object,
-    PartialValues                   extends Partial<Values>,
+    T             extends z.ZodRawShape,
+    Catchall      extends z.ZodTypeAny,
+    Values        extends object,
+    PartialValues extends Partial<Values>,
 >(
-    props: {
-        schema: z.ZodObject<SchemaT, "strip", SchemaCatchall, Values, Values>
-
-        schemaWithDefaultValues: (
-            schema: z.ZodObject<SchemaT, "strip", SchemaCatchall, Values, Values>
-        ) => z.ZodObject<SchemaWithDefaultValuesT, "strip", SchemaWithDefaultValuesCatchall, Values, PartialValues>
-    }
+    schema: z.ZodObject<T, "strip", Catchall, Values, PartialValues>
 ) {
     return expression
         .extends(ZodSchemaObjectConstructor<Values>)
-        .expresses(ZodSchemaObject(props.schema, props.schemaWithDefaultValues(props.schema)))
+        .expresses(ZodSchemaObject(schema))
 }
diff --git a/src/tests.ts b/src/tests.ts
index 2caa7d2..42f4ca7 100644
--- a/src/tests.ts
+++ b/src/tests.ts
@@ -31,19 +31,15 @@ import { MobXObservableZodSchemaObject } from "./traits/MobXObservableZodSchemaO
 //     .expresses(MobXObservableZodSchemaObject)
 //     .build()
 
-const exp = ZodSchemaClass({
-    schema: z.object({
+const exp = ZodSchemaClass(
+    z.object({
         /** User ID */
-        id: z.bigint(),
+        id: z.bigint().default(-1n),
 
         /** Username */
         name: z.string(),
-    }),
-
-    schemaWithDefaultValues: s => s.extend({
-        id: s.shape.id.default(-1n),
-    }),
-})
+    })
+)
     .expresses(MobXObservableZodSchemaObject)
     .build()
 
diff --git a/src/traits/ZodSchemaObject.ts b/src/traits/ZodSchemaObject.ts
index 4ccb7d7..e5ddb0c 100644
--- a/src/traits/ZodSchemaObject.ts
+++ b/src/traits/ZodSchemaObject.ts
@@ -1,7 +1,7 @@
 import { ImplStatic, trait } from "@thilawyn/traitify-ts"
 import { Class, HasRequiredKeys } from "type-fest"
 import { z } from "zod"
-import { StaticMembers, parseZodSchemaEffect } from "../util"
+import { StaticMembers, parseZodSchemaEffect, stripZodObjectDefaults } from "../util"
 
 
 type CreateArgs<Input extends object> = (
@@ -12,33 +12,29 @@ type CreateArgs<Input extends object> = (
 
 
 export const ZodSchemaObject = <
-    SchemaT                         extends z.ZodRawShape,
-    SchemaCatchall                  extends z.ZodTypeAny,
-    SchemaWithDefaultValuesT        extends z.ZodRawShape,
-    SchemaWithDefaultValuesCatchall extends z.ZodTypeAny,
-
-    Values                          extends object,
-    PartialValues                   extends Partial<Values>,
+    T             extends z.ZodRawShape,
+    Catchall      extends z.ZodTypeAny,
+    Values        extends object,
+    PartialValues extends Partial<Values>,
 >(
-    schema:                   z.ZodObject<SchemaT, "strip", SchemaCatchall, Values, Values>,
-    schemaWithDefaultValues:  z.ZodObject<SchemaWithDefaultValuesT, "strip", SchemaWithDefaultValuesCatchall, Values, PartialValues>,
+    schemaWithDefaults: z.ZodObject<T, "strip", Catchall, Values, PartialValues>,
 ) => trait
     .implement(Super => {
         class ZodSchemaObject extends Super {
-            static readonly schema                  = schema
-            static readonly schemaWithDefaultValues = schemaWithDefaultValues
+            static readonly schema             = stripZodObjectDefaults(schemaWithDefaults)
+            static readonly schemaWithDefaults = schemaWithDefaults
 
             static transform<
-                Instance    extends Values,
+                Instance             extends Values,
 
-                T           extends z.ZodRawShape,
-                UnknownKeys extends z.UnknownKeysParam,
-                Catchall    extends z.ZodTypeAny,
-                Output      extends Values,
-                Input,
+                TransformT           extends z.ZodRawShape,
+                TransformUnknownKeys extends z.UnknownKeysParam,
+                TransformCatchall    extends z.ZodTypeAny,
+                TransformOutput      extends Values,
+                TransformInput,
             >(
                 this:    Class<Instance, [values: Values]>,
-                schema:  z.ZodObject<T, UnknownKeys, Catchall, Output, Input>,
+                schema:  z.ZodObject<TransformT, TransformUnknownKeys, TransformCatchall, TransformOutput, TransformInput>,
             ) {
                 return schema.transform(values => new this(values))
             }
@@ -54,7 +50,7 @@ export const ZodSchemaObject = <
                 ...[values, params]: CreateArgs<PartialValues>
             ) {
                 return this
-                    .transform(this.schemaWithDefaultValues)
+                    .transform(this.schemaWithDefaults)
                     .parse(values, params)
             }
 
@@ -68,7 +64,7 @@ export const ZodSchemaObject = <
                 ...[values, params]: CreateArgs<PartialValues>
             ) {
                 return this
-                    .transform(this.schemaWithDefaultValues)
+                    .transform(this.schemaWithDefaults)
                     .parseAsync(values, params)
             }
 
@@ -82,7 +78,7 @@ export const ZodSchemaObject = <
                 ...[values, params]: CreateArgs<PartialValues>
             ) {
                 return parseZodSchemaEffect(
-                    this.transform(this.schemaWithDefaultValues),
+                    this.transform(this.schemaWithDefaults),
                     values,
                     params,
                 )
@@ -95,23 +91,12 @@ export const ZodSchemaObject = <
 
 
 export type ZodSchemaObjectTrait<
-    SchemaT                            extends z.ZodRawShape,
-    SchemaCatchall                     extends z.ZodTypeAny,
-    SchemaWithDefaultValuesT           extends z.ZodRawShape,
-    SchemaWithDefaultValuesCatchall    extends z.ZodTypeAny,
-
-    Values                             extends object,
-    PartialValues                      extends Partial<Values>,
+    T             extends z.ZodRawShape,
+    Catchall      extends z.ZodTypeAny,
+    Values        extends object,
+    PartialValues extends Partial<Values>,
 > = (
     ReturnType<
-        typeof ZodSchemaObject<
-            SchemaT,
-            SchemaCatchall,
-            SchemaWithDefaultValuesT,
-            SchemaWithDefaultValuesCatchall,
-
-            Values,
-            PartialValues
-        >
+        typeof ZodSchemaObject<T, Catchall, Values, PartialValues>
     >
 )