Index: ammosreader/AmmosContainer.py
===================================================================
--- ammosreader/AmmosContainer.py	(revision d62906b424075be02d6d826c7b269a6d75d629ff)
+++ ammosreader/AmmosContainer.py	(revision ee95332544b2568100e3de30f32e7fa6a002ca1b)
@@ -43,5 +43,5 @@
 
     def is_homogenic(self):
-        return (len(self.frame_sizes()) == 1) and (len(self.frame_types()) == 1)
+        return (len(self.unique_frame_sizes()) == 1) and (len(self.frame_types()) == 1)
 
     def __str__(self):