diff --git a/twrp-functions.hpp b/twrp-functions.hpp
index b3019bd..19ca10b 100644
--- a/twrp-functions.hpp
+++ b/twrp-functions.hpp
@@ -37,7 +37,8 @@
 	static void Update_Intent_File(string Intent);                              // Updates intent file
 	static int tw_reboot(RebootCommand command);                                // Prepares the device for rebooting
 	static void check_and_run_script(const char* script_file, const char* display_name); // checks for the existence of a script, chmods it to 755, then runs it
-	static int Exec_Cmd(string cmd, string &result); //execute a command and return the result as a string by reference
+	static int Exec_Cmd(const string& cmd, string &result); //execute a command and return the result as a string by reference
+	static int Exec_Cmd(const string& cmd); //execute a command
 	static int removeDir(const string path, bool removeParent); //recursively remove a directory
 	static int copy_file(string src, string dst, int mode); //copy file from src to dst with mode permissions
 	static unsigned int Get_D_Type_From_Stat(string Path);                      // Returns a dirent dt_type value using stat instead of dirent