diff --git a/src/enums/hash-format.ts b/src/enums/hash-format.ts
index b827455..fa5b531 100644
--- a/src/enums/hash-format.ts
+++ b/src/enums/hash-format.ts
@@ -10,6 +10,6 @@ export function isValidHashFormat(hashFormat: string): HashFormat {
   if (hashFormat in HashFormat) {
     return HashFormat[hashFormat as keyof typeof HashFormat];
   } else {
-    throw new Error("Invalid index file hash format!");
+    throw new Error(`Invalid index file hash format: ${hashFormat}`);
   }
 }