diff --git a/queries/c/highlights.scm b/queries/c/highlights.scm
index 65aac5051..930c89e39 100644
--- a/queries/c/highlights.scm
+++ b/queries/c/highlights.scm
@@ -14,6 +14,7 @@
   "union"
   "volatile"
   "goto"
+  "register"
 ] @keyword
 
 [