1 files changed, 1 insertions, 1 deletions
diff --git a/Crypto.hs b/Crypto.hs
index efc754f..2fe27e0 100644
--- a/Crypto.hs
+++ b/Crypto.hs
@@ -31,7 +31,7 @@ class Signed t where
 instance Hashable a => Signed (Activity a) where
 	getSignature = activitySignature
 	hashExceptSignature (Activity a mpa mpe mt _s) = hash $
-		Tagged "Activity" [hash a, hash mpa, hash mpe, hash mt]
+		Tagged "Activity" [hash a, hashOfMaybeUnsafe mpa, hashOfMaybeUnsafe mpe, hash mt]
 
 instance Signed Control where
 	getSignature = controlSignature