diff --git a/src/client/src/error.rs b/src/client/src/error.rs
index 2e3e78d19b1e..c8641087d430 100644
--- a/src/client/src/error.rs
+++ b/src/client/src/error.rs
@@ -192,6 +192,9 @@ impl Error {
             } | Self::RegionServer {
                 code: Code::Unavailable,
                 ..
+            } | Self::RegionServer {
+                code: Code::Unknown,
+                ..
             }
         )
     }