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