diff --git a/files/classes/user.py b/files/classes/user.py
index 0453d94d1..5baf2e5de 100644
--- a/files/classes/user.py
+++ b/files/classes/user.py
@@ -743,6 +743,11 @@ class User(Base):
 
 		return output
 
+	@property
+	@lazy
+	def alt_ids(self):
+		return [x.id for x in self.alts]
+
 	@property
 	@lazy
 	def moderated_subs(self):
diff --git a/files/routes/votes.py b/files/routes/votes.py
index e681acb24..d9ab61768 100644
--- a/files/routes/votes.py
+++ b/files/routes/votes.py
@@ -61,6 +61,9 @@ def vote_post_comment(target_id, new, v, cls, vote_cls):
 	if v.id == target.author.id:
 		coin_delta = 0
 
+	if target.author.id in v.alt_ids or v.id in target.author.alt_ids:
+		coin_delta = -1
+
 	coin_mult = 1
 
 	g.db.flush()