diff --git a/include/redox/client.hpp b/include/redox/client.hpp
index 6bfca27..f8f670d 100644
--- a/include/redox/client.hpp
+++ b/include/redox/client.hpp
@@ -394,7 +394,7 @@ Command<ReplyT> &Redox::createCommand(const std::vector<std::string> &cmd,
                                       const std::function<void(Command<ReplyT> &)> &callback,
                                       double repeat, double after, bool free_memory) {
   {
-    unique_lock<mutex> ul(running_lock_);
+    std::unique_lock<std::mutex> ul(running_lock_);
     if (!running_) {
       throw std::runtime_error("[ERROR] Need to connect Redox before running commands!");
     }