diff --git a/runtime/queries/dart/highlights.scm b/runtime/queries/dart/highlights.scm
index a7d047f0a61d..dab58496223b 100644
--- a/runtime/queries/dart/highlights.scm
+++ b/runtime/queries/dart/highlights.scm
@@ -200,6 +200,7 @@
     "async"
     "async*"
     "await"
+    "base"
     "class"
     "covariant"
     "deferred"
@@ -231,7 +232,7 @@
 
 ; when used as an identifier:
 ((identifier) @variable.builtin
- (#match? @variable.builtin "^(abstract|as|covariant|deferred|dynamic|export|external|factory|Function|get|implements|import|interface|library|operator|mixin|part|sealed|set|static|typedef)$"))
+ (#match? @variable.builtin "^(abstract|as|base|covariant|deferred|dynamic|export|external|factory|Function|get|implements|import|interface|library|operator|mixin|part|sealed|set|static|typedef)$"))
 
 ; Error
 (ERROR) @error