diff --git a/pkg/kernel/lib/transformations/constants.dart b/pkg/kernel/lib/transformations/constants.dart
index b66629c..d0799cd 100644
--- a/pkg/kernel/lib/transformations/constants.dart
+++ b/pkg/kernel/lib/transformations/constants.dart
@@ -348,6 +348,17 @@
     return super.visitStaticInvocation(node);
   }
 
+  visitConstantExpression(ConstantExpression node) {
+    Constant constant = node.constant;
+    if (constant is UnevaluatedConstant) {
+      Expression expression = constant.expression;
+      return tryEvaluateAndTransformWithContext(expression, expression);
+    } else {
+      node.constant = constantEvaluator.canonicalize(constant);
+      return node;
+    }
+  }
+
   tryEvaluateAndTransformWithContext(TreeNode treeContext, Expression node) {
     final Constant constant = tryEvaluateWithContext(treeContext, node);
     return constant != null ? new ConstantExpression(constant) : node;