diff --git a/lab1/coding.h b/lab1/coding.h
index f42c1ba..f4e2a68 100644
--- a/lab1/coding.h
+++ b/lab1/coding.h
@@ -1,5 +1,5 @@
-#ifndef __CODING_H
-#define __CODING_H
+#ifndef CODING_H
+#define CODING_H
 
 unsigned char encode(unsigned char c);
 unsigned char decode(unsigned char c);
diff --git a/lab3/User.h b/lab3/User.h
index d741e2c..cbedfe0 100644
--- a/lab3/User.h
+++ b/lab3/User.h
@@ -1,5 +1,5 @@
-#ifndef __USER_H
-#define __USER_H
+#ifndef USER_H
+#define USER_H
 
 #include <iostream>
 #include <string>
diff --git a/lab3/UserTable.h b/lab3/UserTable.h
index 075ac80..daa4af9 100644
--- a/lab3/UserTable.h
+++ b/lab3/UserTable.h
@@ -1,5 +1,5 @@
-#ifndef __USERTABLE_H
-#define __USERTABLE_H
+#ifndef USERTABLE_H
+#define USERTABLE_H
 
 #include <iostream>