diff --git a/packages/mermaid/src/diagram-api/types.ts b/packages/mermaid/src/diagram-api/types.ts
index 56364e9c6..1a73bf70d 100644
--- a/packages/mermaid/src/diagram-api/types.ts
+++ b/packages/mermaid/src/diagram-api/types.ts
@@ -35,7 +35,8 @@ export interface DiagramDB {
   getAccTitle?: () => string;
   setAccDescription?: (description: string) => void;
   getAccDescription?: () => string;
-
+  getDirection?: () => string;
+  setDirection?: (direction: string) => void;
   setDisplayMode?: (title: string) => void;
   bindFunctions?: (element: Element) => void;
 }