diff --git a/queries/slint/highlights.scm b/queries/slint/highlights.scm
index 957032497..f1ac2de2c 100644
--- a/queries/slint/highlights.scm
+++ b/queries/slint/highlights.scm
@@ -120,6 +120,7 @@
 
 [
  ":="
+ "<=>"
  "!"
  "-"
  "+"