diff --git a/lbry/wallet/server/db/elasticsearch/search.py b/lbry/wallet/server/db/elasticsearch/search.py
index 6f9820e54..6e79cb39e 100644
--- a/lbry/wallet/server/db/elasticsearch/search.py
+++ b/lbry/wallet/server/db/elasticsearch/search.py
@@ -90,7 +90,7 @@ class SearchIndex:
         index_version = await self.get_index_version()
         if index_version != self.VERSION:
             self.logger.error("es search index has an incompatible version: %s vs %s", index_version, self.VERSION)
-            raise IndexVersionMismatch(f"{index_version} vs {self.VERSION}")
+            raise IndexVersionMismatch(index_version, self.VERSION)
         return acked
 
     def stop(self):