diff --git a/pymemcache/client/base.py b/pymemcache/client/base.py
index b1ba0a8..c69319a 100644
--- a/pymemcache/client/base.py
+++ b/pymemcache/client/base.py
@@ -1169,8 +1169,8 @@ def _fetch_cmd(
             expire_bytes = self._check_integer(expire, "expire")
             cmd += b" " + expire_bytes
 
-        if prefixed_keys:
-            cmd += b" " + b" ".join(prefixed_keys)
+        #if prefixed_keys:
+            #cmd += b" " + b" ".join(prefixed_keys)
         cmd += b"\r\n"
 
         try: