diff --git a/index.d.ts b/index.d.ts
index a1808f5..9fc7b71 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -125,6 +125,7 @@ export namespace expectedVersion {
     const any: number;
     const noStream: number;
     const emptyStream: number;
+    const streamExists: number;
 }
 
 export namespace positions {