diff --git a/spacy/symbols.pyx b/spacy/symbols.pyx
index d0533d2cf..7254297d4 100644
--- a/spacy/symbols.pyx
+++ b/spacy/symbols.pyx
@@ -371,7 +371,6 @@ IDS = {
     "ORDINAL": ORDINAL,
     "CARDINAL": CARDINAL,
 
-    "acl": acl,
     "acomp": acomp,
     "advcl": advcl,
     "advmod": advmod,