diff --git a/queries/cuda/highlights.scm b/queries/cuda/highlights.scm
index 404c72afb..7897c4144 100644
--- a/queries/cuda/highlights.scm
+++ b/queries/cuda/highlights.scm
@@ -11,4 +11,5 @@
   "__forceinline__"
   "__restrict__"
   "__launch_bounds__"
+  "__grid_constant__"
 ] @keyword