diff --git a/src/object.ts b/src/object.ts
index 55204dd51..6429e2082 100644
--- a/src/object.ts
+++ b/src/object.ts
@@ -202,7 +202,7 @@ export default class ObjectSchema<
         fieldValue =
           !options.__validating || !strict
             ? // TODO: use _cast, this is double resolving
-              field.cast(value[prop], innerOptions)
+              (field as ISchema<any>).cast(value[prop], innerOptions)
             : value[prop];
 
         if (fieldValue !== undefined) {
diff --git a/src/util/objectTypes.ts b/src/util/objectTypes.ts
index 7943cf3b1..b1b9c53e4 100644
--- a/src/util/objectTypes.ts
+++ b/src/util/objectTypes.ts
@@ -6,8 +6,10 @@ export type ObjectShape = { [k: string]: ISchema<any> | Reference };
 
 export type AnyObject = { [k: string]: any };
 
-export type TypeFromShape<S extends ObjectShape, C> = {
-  [K in keyof S]: S[K] extends ISchema<any, C> ? S[K]['__outputType'] : unknown;
+export type TypeFromShape<S extends ObjectShape, _C> = {
+  [K in keyof S]: S[K] extends ISchema<any, any>
+    ? S[K]['__outputType']
+    : unknown;
 };
 
 export type DefaultFromShape<Shape extends ObjectShape> = {