diff --git a/queries/phpdoc/highlights.scm b/queries/phpdoc/highlights.scm
index e0624365d..5cb3dba06 100644
--- a/queries/phpdoc/highlights.scm
+++ b/queries/phpdoc/highlights.scm
@@ -22,6 +22,7 @@
     (array_type)
     (primitive_type)
     (named_type)
+    (optional_type)
   ] @type)
 (tag
   (description (text) @text))