diff --git a/types/ldapjs/index.d.ts b/types/ldapjs/index.d.ts
index 5d0298c73b..a576fa3ba7 100644
--- a/types/ldapjs/index.d.ts
+++ b/types/ldapjs/index.d.ts
@@ -18,15 +18,15 @@ export interface ErrorCallback {
 }
 
 export interface CompareCallback {
-	(error: Error, matched?: boolean): void;
+	(error: Error | null, matched?: boolean): void;
 }
 
 export interface ExopCallback {
-	(error: Error, value: string, result?: any): void;
+	(error: Error | null, value: string, result?: any): void;
 }
 
 export interface CallBack {
-	(error: Error, result?: any): void;
+	(error: Error | null, result?: any): void;
 }
 
 export interface ClientOptions {