diff --git a/15_Day_Python_type_errors/15_python_type_errors.md b/15_Day_Python_type_errors/15_python_type_errors.md
index 16c3e7136..0513689a4 100644
--- a/15_Day_Python_type_errors/15_python_type_errors.md
+++ b/15_Day_Python_type_errors/15_python_type_errors.md
@@ -183,7 +183,7 @@ AttributeError: module 'math' has no attribute 'PI'
 >>>
 ```
 
-As you can see, I made a mistake again! Instead of pi, I tried to call a PI function from maths module. It raised an attribute error, it means, that the function does not exist in the module. Lets fix it by changing from PI to pi.
+As you can see, I made a mistake again! Instead of pi, I tried to call a PI constant from maths module. It raised an attribute error, it means, that the attribute does not exist in the module. Lets fix it by changing from PI to pi.
 
 ```py
 asabeneh@Asabeneh:~$ python
@@ -358,4 +358,4 @@ If you are good at reading the error types then you will be able to fix your bug
 
 🎉 CONGRATULATIONS ! 🎉
 
-[<< Day 14](../14_Day_Higher_order_functions/14_higher_order_functions.md) | [Day 16 >>](../16_Day_Python_date_time/16_python_datetime.md)
\ No newline at end of file
+[<< Day 14](../14_Day_Higher_order_functions/14_higher_order_functions.md) | [Day 16 >>](../16_Day_Python_date_time/16_python_datetime.md)