diff --git a/src/ssn/reader/bencodeParser.ts b/src/ssn/reader/bencodeParser.ts
index 3747d68..1876225 100644
--- a/src/ssn/reader/bencodeParser.ts
+++ b/src/ssn/reader/bencodeParser.ts
@@ -73,7 +73,7 @@ function bpParse(dv: DataView, posIn: number = 0): { obj: any, pos: number } {
       break;
     }
     default:
-     throw new Error('Unexpected leading char during bencode parsing.');
+      throw new Error(`Unexpected leading char during bencode parsing at position ${pos}.`);
   }
   return { obj, pos };
 }