diff --git a/source/ubl-settings-datetime.cc b/source/ubl-settings-datetime.cc
index db95cfe..147c6c1 100755
--- a/source/ubl-settings-datetime.cc
+++ b/source/ubl-settings-datetime.cc
@@ -384,12 +384,8 @@ void MainWindow::synopsis_show() {
     int start_error = error_info;
     string cmd = "xdg-open " + string(_("https://wiki.ublinux.com/ru/Программное_обеспечение/Программы_и_утилиты/Все/")) + app_name;
     if (geteuid() == 0) {
-        string response_user = this->call("who");
-        size_t index = response_user.find(" ");
-        if (index != std::string::npos){
-            response_user =  response_user.substr(0, index);
-            cmd = "su -l " + response_user + " -c \" DISPLAY=$DISPLAY " + cmd + " \"";
-        }
+        string response_user =  getlogin();
+        cmd = "su -l " + response_user + " -c \" DISPLAY=$DISPLAY " + cmd + " \"";
     }
     wrapper_system(cmd, "&");
     if (start_error != error_info) {
diff --git a/source/ubl-settings-datetime.h b/source/ubl-settings-datetime.h
index 0742f9e..83ee0a5 100644
--- a/source/ubl-settings-datetime.h
+++ b/source/ubl-settings-datetime.h
@@ -16,6 +16,7 @@
 #include <unicode/timezone.h>
 #include <unicode/calendar.h>
 #include <map>
+#include <pwd.h>
 #include "ubl-util-standard.c"