diff --git a/cpp-subprocess/subprocess.hpp b/cpp-subprocess/subprocess.hpp
index 63fd762..7267fff 100644
--- a/cpp-subprocess/subprocess.hpp
+++ b/cpp-subprocess/subprocess.hpp
@@ -1380,8 +1380,7 @@ class Popen
   friend class detail::Child;
 
   template <typename... Args>
-  Popen(const std::string& cmd_args, Args&& ...args):
-    args_(cmd_args)
+  Popen(const std::string& cmd_args, Args&& ...args)
   {
     vargs_ = util::split(cmd_args);
     init_args(std::forward<Args>(args)...);
@@ -1510,8 +1509,6 @@ class Popen
   env_map_t env_;
   preexec_func preexec_fn_;
 
-  // Command in string format
-  std::string args_;
   // Command provided as sequence
   std::vector<std::string> vargs_;
   std::vector<char*> cargv_;