diff --git a/masque/shapes/path.py b/masque/shapes/path.py
index ad6da5d..9c31561 100644
--- a/masque/shapes/path.py
+++ b/masque/shapes/path.py
@@ -477,11 +477,13 @@ class Path(Shape):
     def _calculate_cap_extensions(self) -> NDArray[numpy.float64]:
         if self.cap == PathCap.Square:
             extensions = numpy.full(2, self.width / 2)
+        elif self.cap == PathCap.Circle:
+            extensions = numpy.full(2, self.width / 2)
         elif self.cap == PathCap.SquareCustom:
             assert isinstance(self.cap_extensions, numpy.ndarray)
             extensions = self.cap_extensions
         else:
-            # Flush or Circle
+            # Flush
             extensions = numpy.zeros(2)
         return extensions