diff --git a/pokemontools/vba/vba.py b/pokemontools/vba/vba.py
index 433df40..007c132 100644
--- a/pokemontools/vba/vba.py
+++ b/pokemontools/vba/vba.py
@@ -557,5 +557,5 @@ class crystal(object):
         """
         Returns the HP of the current enemy.
         """
-        hp = ((self.cry.vba.memory[0xd218] << 8) | self.cry.vba.memory[0xd217])
+        hp = ((self.vba.memory[0xd218] << 8) | self.vba.memory[0xd217])
         return hp