diff --git a/queries/php/highlights.scm b/queries/php/highlights.scm
index 8a66a11d8..db2223dbd 100644
--- a/queries/php/highlights.scm
+++ b/queries/php/highlights.scm
@@ -97,6 +97,7 @@
  "declare"
  "default"
  "echo"
+ "unset"
  "enddeclare"
  "extends"
  "final"