diff --git a/lib/compress.js b/lib/compress.js
index 3964636f..47bbaf97 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -403,7 +403,7 @@ merge(Compressor.prototype, {
 
             return make_node(AST_Number, orig, { value: val });
           case "boolean":
-            return make_node(val ? AST_True : AST_False, orig).transform(compressor);
+            return make_node(val ? AST_True : AST_False, orig).optimize(compressor);
           case "undefined":
             return make_node(AST_Undefined, orig).transform(compressor);
           default: