diff --git a/src/rest.rs b/src/rest.rs
index faa7dfba..6d69aa9f 100644
--- a/src/rest.rs
+++ b/src/rest.rs
@@ -725,7 +725,7 @@ fn handle_request(
                 .ok_or_else(|| HttpError::not_found("Block not found".to_string()))?;
             json_response(txids, TTL_LONG)
         }
-        (&Method::GET, Some(&"block"), Some(hash), Some(&"txs"), None, None) => {
+        (&Method::GET, Some(&INTERNAL_PREFIX), Some(&"block"), Some(hash), Some(&"txs"), None) => {
             let hash = BlockHash::from_hex(hash)?;
             let txs = query
                 .chain()