diff --git a/types/requirejs/index.d.ts b/types/requirejs/index.d.ts
index ac116494f3..b2d5879e85 100644
--- a/types/requirejs/index.d.ts
+++ b/types/requirejs/index.d.ts
@@ -48,7 +48,7 @@ interface RequireError extends Error {
 	/**
 	* Required modules.
 	**/
-	requireModules: string[];
+	requireModules: string[] | null;
 
 	/**
 	* The original error, if there is one (might be null).