diff --git a/ngbootbox/ngbootbox.d.ts b/ngbootbox/ngbootbox.d.ts
index 4c6233dab..e99e47979 100644
--- a/ngbootbox/ngbootbox.d.ts
+++ b/ngbootbox/ngbootbox.d.ts
@@ -26,7 +26,7 @@ interface BootboxService {
 	alert(msg: string): Promise<any>;
 	confirm(msg: string): Promise<any>;
 	prompt(msg: string): Promise<any>;
-	customDialog(options: IBootboxDialog): void;
+	customDialog(options: NgBootboxDialog): void;
 	setDefaults(options: BootboxDefaultOptions): void;
 	hideAll(): void;