diff --git a/lib/Predis/Profiles/ServerProfile.php b/lib/Predis/Profiles/ServerProfile.php
index 876d13ce..33be4560 100644
--- a/lib/Predis/Profiles/ServerProfile.php
+++ b/lib/Predis/Profiles/ServerProfile.php
@@ -70,8 +70,7 @@ abstract class ServerProfile implements IServerProfile, IProcessingSupport {
     }
 
     public function supportsCommand($command) {
-        $command = strtolower($command);
-        return isset($this->_registeredCommands[$command]);
+        return isset($this->_registeredCommands[strtolower($command)]);
     }
 
     public function createCommand($method, $arguments = array()) {