diff --git a/turtlesim/tutorials/draw_square.cpp b/turtlesim/tutorials/draw_square.cpp
index dbb8adcd..8a3400c9 100644
--- a/turtlesim/tutorials/draw_square.cpp
+++ b/turtlesim/tutorials/draw_square.cpp
@@ -119,7 +119,7 @@ void turn(rclcpp::Publisher<geometry_msgs::msg::Twist>::SharedPtr twist_pub)
 
 void timerCallback(rclcpp::Publisher<geometry_msgs::msg::Twist>::SharedPtr twist_pub)
 {
-  if (g_first_pose_set)
+  if (!g_first_pose_set) // Fixed the issue where only a straight line was drawn instead of a square.
   {
     return;
   }