diff --git a/src/GLApp.cpp b/src/GLApp.cpp
index e21fdb1..2d6bd55 100644
--- a/src/GLApp.cpp
+++ b/src/GLApp.cpp
@@ -1,14 +1,13 @@
-#include "GLApp.h"
 #include <GL/glew.h>
-
+#include "GLApp.h"
 #include <iostream>
 
-bool wired = false;
-void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+bool wiredFlag = false;
+void keyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
 {
 	if (key == GLFW_KEY_M && action == GLFW_PRESS) {
-		glPolygonMode(GL_FRONT_AND_BACK, wired ? GL_FILL : GL_LINE);
-		wired = !wired;
+		glPolygonMode(GL_FRONT_AND_BACK, wiredFlag ? GL_FILL : GL_LINE);
+		wiredFlag = !wiredFlag;
 	}
 }
 
@@ -48,7 +47,7 @@ void GLApp::init() {
 
 	_window = glfwCreateWindow(1024, 1024, "OpenGL", nullptr, nullptr); // Windowed
 	glfwMakeContextCurrent(_window);
-	glfwSetKeyCallback(_window, key_callback);
+	glfwSetKeyCallback(_window, keyCallback);
 
 	glewExperimental = GL_TRUE;
 	GLenum err = glewInit();