diff --git a/packages/nuqs/src/serializer.test.ts b/packages/nuqs/src/serializer.test.ts
index d854f82a..1115fd15 100644
--- a/packages/nuqs/src/serializer.test.ts
+++ b/packages/nuqs/src/serializer.test.ts
@@ -1,10 +1,10 @@
 import { describe, expect, test } from 'vitest'
 import {
+  parseAsArrayOf,
   parseAsBoolean,
   parseAsInteger,
-  parseAsString,
   parseAsJson,
-  parseAsArrayOf
+  parseAsString
 } from './parsers'
 import { createSerializer } from './serializer'
 
diff --git a/packages/nuqs/src/serializer.ts b/packages/nuqs/src/serializer.ts
index ceac696d..8da2e65c 100644
--- a/packages/nuqs/src/serializer.ts
+++ b/packages/nuqs/src/serializer.ts
@@ -10,9 +10,10 @@ type Base = string | URLSearchParams | URL
 type Values<Parsers extends Record<string, ParserBuilder<any>>> = Partial<{
   [K in keyof Parsers]?: ExtractParserType<Parsers[K]>
 }>
+type ParserWithOptionalDefault<T> = ParserBuilder<T> & { defaultValue?: T }
 
 export function createSerializer<
-  Parsers extends Record<string, ParserBuilder<any>>
+  Parsers extends Record<string, ParserWithOptionalDefault<any>>
 >(parsers: Parsers) {
   /**
    * Generate a query string for the given values.
@@ -42,9 +43,7 @@ export function createSerializer<
         continue
       }
       const isMatchingDefault =
-        // @ts-expect-error
         parser.defaultValue !== undefined &&
-        // @ts-expect-error
         (parser.eq ?? ((a, b) => a === b))(value, parser.defaultValue)
 
       if (value === null || (parser.clearOnDefault && isMatchingDefault)) {