diff --git a/runtime/src/RuleContext.h b/runtime/src/RuleContext.h
index 9ee0d2d..fd3670a 100755
--- a/runtime/src/RuleContext.h
+++ b/runtime/src/RuleContext.h
@@ -126,6 +126,7 @@ namespace antlr4 {
     // recog null unless ParserRuleContext, in which case we use subclass toString(...)
     std::string toString(Recognizer *recog, RuleContext *stop);
 
+    using ParseTree::operator==;
     virtual std::string toString(const std::vector<std::string> &ruleNames, RuleContext *stop);
 
     bool operator == (const RuleContext &other) { return this == &other; } // Simple address comparison.