diff --git a/packages/gatsby-source-filesystem/index.d.ts b/packages/gatsby-source-filesystem/index.d.ts
index d710142241cb5..89812d4dc49fc 100644
--- a/packages/gatsby-source-filesystem/index.d.ts
+++ b/packages/gatsby-source-filesystem/index.d.ts
@@ -10,7 +10,7 @@ export function createFilePath(args: CreateFilePathArgs): string
  */
 export function createRemoteFileNode(
   args: CreateRemoteFileNodeArgs
-): FileSystemNode
+): Promise<FileSystemNode>
 
 export interface CreateFilePathArgs {
   node: Node