diff --git a/calculator.py b/calculator.py
index b0ef5dca8dd..089002f1af6 100644
--- a/calculator.py
+++ b/calculator.py
@@ -11,7 +11,7 @@
                          / : division
                          % : percentage
                          e : 2.718281...
-                        pi : 3.141592... 
+                        π : 3.141592... 
                       sine : sin(rad)
                     cosine : cos(rad)
                    exponent: x^y