diff --git a/packages/logger/src/index.ts b/packages/logger/src/index.ts
index 9597aa813a..68b5545b17 100644
--- a/packages/logger/src/index.ts
+++ b/packages/logger/src/index.ts
@@ -42,6 +42,10 @@ debug.formatters.a = (v?: Multiaddr): string => {
   return v == null ? 'undefined' : v.toString()
 }
 
+// Add a formatter for stringifying BigInts
+debug.formatters.i = (v?: bigint): string => {
+  return v == null ? 'undefined' : v.toLocaleString()
+}
 export interface Logger {
   (formatter: any, ...args: any[]): void
   error: (formatter: any, ...args: any[]) => void
diff --git a/packages/logger/test/index.spec.ts b/packages/logger/test/index.spec.ts
index 8b8b1b6731..16e2dbcf5f 100644
--- a/packages/logger/test/index.spec.ts
+++ b/packages/logger/test/index.spec.ts
@@ -12,6 +12,8 @@ import { toString as unint8ArrayToString } from 'uint8arrays/to-string'
 import { logger } from '../src/index.js'
 
 describe('logger', () => {
+  const debugSpy = sinon.spy(debug, 'log')
+
   it('creates a logger', () => {
     const log = logger('hello')
 
@@ -80,13 +82,22 @@ describe('logger', () => {
 
     const ma = multiaddr('/ip4/127.0.0.1/tcp/4001')
 
-    const debugSpy = sinon.spy(debug, 'log')
-
     log('multiaddr %a', ma)
 
     expect(debugSpy.firstCall.args[0], 'Multiaddr formatting not included').to.include(`multiaddr ${ma.toString()}`)
   })
 
+  it('test printf style formatting for big int', () => {
+    const log = logger('printf-style')
+    debug.enable('printf-style')
+
+    const bi = BigInt(12345678901234567168)
+
+    log('big int %i', bi)
+
+    expect(debugSpy.secondCall.args[0], 'Big int formatting not included').to.include(`big int ${bi.toLocaleString()}`)
+  })
+
   it('test ma formatter', () => {
     const ma = multiaddr('/ip4/127.0.0.1/tcp/4001')