diff --git a/Lab_20/Lab_20/Z_6.cpp b/Lab_20/Lab_20/Z_6.cpp
index d5a44be..3ab0aa9 100644
--- a/Lab_20/Lab_20/Z_6.cpp
+++ b/Lab_20/Lab_20/Z_6.cpp
@@ -4,6 +4,7 @@
 #include <stdlib.h>
 
 int Iz1;
+int Iz2;
 
 struct Node {
 	int data;