diff -uNr vtm-0.5.15/src/netxs/os/system.hpp vtm-0.5.15.mod/src/netxs/os/system.hpp
--- vtm-0.5.15/src/netxs/os/system.hpp	2021-08-05 00:50:44.000000000 +0300
+++ vtm-0.5.15.mod/src/netxs/os/system.hpp	2021-10-04 19:44:51.626533289 +0300
@@ -81,7 +81,7 @@
 
     #if defined(__linux__)
         #include <sys/vt.h> // ::console_ioctl()
-        #include <sys/kd.h> // ::console_ioctl()
+        #include <linux/kd.h> // ::console_ioctl()
         #include <linux/keyboard.h> // ::keyb_ioctl()
     #endif
 #endif
@@ -1464,7 +1464,7 @@
             #elif defined(__linux__)
 
                 ucred cred = {};
-                unsigned size = sizeof(cred);
+                socklen_t size = sizeof(cred);
 
                 if (!ok(::getsockopt(handle.h, SOL_SOCKET, SO_PEERCRED, &cred, &size), "getsockopt error"))
                     return faux;
@@ -2634,4 +2634,4 @@
     };
 }
 
-#endif // NETXS_SYSTEM_HPP
\ В конце файла нет новой строки
+#endif // NETXS_SYSTEM_HPP