diff --git a/syntax/beluga.vim b/syntax/beluga.vim
index 77713cc..130c078 100644
--- a/syntax/beluga.vim
+++ b/syntax/beluga.vim
@@ -77,3 +77,7 @@ hi def link belBool Boolean
 
 syn keyword belIf if then else
 hi def link belIf Keyword
+
+syn match belugaError /<-/
+syn keyword belugaError prop
+hi def link belugaError Error