diff --git a/mustergenerator.py b/mustergenerator.py
index 2631b80..0f4b954 100644
--- a/mustergenerator.py
+++ b/mustergenerator.py
@@ -8,7 +8,7 @@ class Circle:
         assert length >= 0, "length can not be negative"
         assert height >= 0, "height can not be negative"
         assert radius >= 0, "radius can not be negative"
-        assert distance >= 2*radius, "distance must be grater den two times the radius"
+        assert distance >= 2*radius, "distance must be grater then two times the radius"
         assert offset >= 0, "offset can only be 0 - 100 %"
         assert offset <= 100, "offset can only be 0 - 100 %"
 
@@ -53,7 +53,7 @@ class Circle:
 
     @distance.setter
     def distance(self, val):
-        assert distance >= 2 * radius, "distance must be grater den two times the radius"
+        assert distance >= 2 * radius, "distance must be grater then two times the radius"
         self.__distance = val
 
     @property