diff --git a/main.cpp b/main.cpp
index d79eca7..2c6a6ed 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,5 @@
 #include <iostream>
-#include "practice_1.h"
+#include "triangle.h"
 
 int main(int argc, char **const argv) {
     PRACTICE::Practice1();