diff --git a/deno/lib/types.ts b/deno/lib/types.ts
index 98bdb61c4..f5f2753a9 100644
--- a/deno/lib/types.ts
+++ b/deno/lib/types.ts
@@ -369,9 +369,8 @@ export abstract class ZodType<
     this.transform = this.transform.bind(this);
     this.default = this.default.bind(this);
     this.describe = this.describe.bind(this);
-
-    this.isNullable = this.isNullable.bind(this);
     this.isOptional = this.isOptional.bind(this);
+    this.isNullable = this.isNullable.bind(this);
   }
 
   optional(): ZodOptional<this> {
diff --git a/src/types.ts b/src/types.ts
index bb0b7e100..3e3f8c297 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -369,9 +369,8 @@ export abstract class ZodType<
     this.transform = this.transform.bind(this);
     this.default = this.default.bind(this);
     this.describe = this.describe.bind(this);
-
-    this.isNullable = this.isNullable.bind(this);
     this.isOptional = this.isOptional.bind(this);
+    this.isNullable = this.isNullable.bind(this);
   }
 
   optional(): ZodOptional<this> {