diff --git a/file/lib/system/chat/command/CommandHandler.class.php b/file/lib/system/chat/command/CommandHandler.class.php
index 4dda64a..270f703 100644
--- a/file/lib/system/chat/command/CommandHandler.class.php
+++ b/file/lib/system/chat/command/CommandHandler.class.php
@@ -63,7 +63,7 @@ public function loadCommand() {
 			return new commands\Plain($this);
 		}
 		
-		$class = '\wcf\system\chat\command\commands\\'.ucfirst($parts[0]);
+		$class = '\wcf\system\chat\command\commands\\'.ucfirst(strtolower($parts[0]));
 		if (!class_exists($class)) {
 			throw new NotFoundException();
 		}