diff --git a/syntax/beluga.vim b/syntax/beluga.vim
index 130c078..9649d01 100644
--- a/syntax/beluga.vim
+++ b/syntax/beluga.vim
@@ -78,6 +78,6 @@ hi def link belBool Boolean
 syn keyword belIf if then else
 hi def link belIf Keyword
 
-syn match belugaError /<-/
+syn match belugaError /<-\|←/
 syn keyword belugaError prop
 hi def link belugaError Error