diff --git a/packages/nuqs/src/parsers.ts b/packages/nuqs/src/parsers.ts
index 82973a601..9a94681b2 100644
--- a/packages/nuqs/src/parsers.ts
+++ b/packages/nuqs/src/parsers.ts
@@ -421,13 +421,13 @@ export function parseAsArrayOf<ItemType>(
 }
 
 type inferSingleParserType<Parser> = Parser extends ParserBuilder<
-  infer Type
+  infer Value
 > & {
-  defaultValue: infer Type
+  defaultValue: infer Value
 }
-  ? Type
-  : Parser extends ParserBuilder<infer Type>
-    ? Type | null
+  ? Value
+  : Parser extends ParserBuilder<infer Value>
+    ? Value | null
     : never
 
 type inferParserRecordType<Map extends Record<string, ParserBuilder<any>>> = {
diff --git a/packages/nuqs/src/serializer.test.ts b/packages/nuqs/src/serializer.test.ts
index e924cc660..5ef06ae53 100644
--- a/packages/nuqs/src/serializer.test.ts
+++ b/packages/nuqs/src/serializer.test.ts
@@ -86,6 +86,20 @@ describe('serializer', () => {
     const result = serialize('?str=foo&external=kept', null)
     expect(result).toBe('?external=kept')
   })
+  test('clears value when setting null for search param that has a default value', () => {
+    const serialize = createSerializer({
+      int: parseAsInteger.withDefault(0)
+    })
+    const result = serialize('?int=1&str=foo', { int: null })
+    expect(result).toBe('?str=foo')
+  })
+  test('clears value when setting null for search param that is set to its default value', () => {
+    const serialize = createSerializer({
+      int: parseAsInteger.withDefault(0)
+    })
+    const result = serialize('?int=0&str=foo', { int: null })
+    expect(result).toBe('?str=foo')
+  })
   test('clears value when setting the default value (`clearOnDefault: true` is the default)', () => {
     const serialize = createSerializer({
       int: parseAsInteger.withDefault(0),
diff --git a/packages/nuqs/src/serializer.ts b/packages/nuqs/src/serializer.ts
index 6b9b2a540..272c05b18 100644
--- a/packages/nuqs/src/serializer.ts
+++ b/packages/nuqs/src/serializer.ts
@@ -1,4 +1,4 @@
-import type { Options } from './defs'
+import type { Nullable, Options } from './defs'
 import type { inferParserType, ParserBuilder } from './parsers'
 import { renderQueryString } from './url-encoding'
 
@@ -16,7 +16,7 @@ export function createSerializer<
     urlKeys?: Partial<Record<keyof Parsers, string>>
   } = {}
 ) {
-  type Values = Partial<inferParserType<Parsers>>
+  type Values = Partial<Nullable<inferParserType<Parsers>>>
 
   /**
    * Generate a query string for the given values.
diff --git a/packages/nuqs/src/tests/serializer.test-d.ts b/packages/nuqs/src/tests/serializer.test-d.ts
index 55a5eaf73..f07eb5215 100644
--- a/packages/nuqs/src/tests/serializer.test-d.ts
+++ b/packages/nuqs/src/tests/serializer.test-d.ts
@@ -48,3 +48,16 @@ import { createSerializer, parseAsInteger, parseAsString } from '../../dist'
     serialize({ nope: null })
   })
 }
+
+// It accepts null for values
+{
+  const serialize = createSerializer({
+    foo: parseAsInteger,
+    bar: parseAsInteger.withDefault(0)
+  })
+  // Should accept number | null | undefined
+  expectType<string>(serialize({ foo: null }))
+  expectType<string>(serialize({ foo: undefined }))
+  expectType<string>(serialize({ bar: null }))
+  expectType<string>(serialize({ bar: undefined }))
+}