diff --git a/runtime/CSharp/Antlr4.Runtime/Parser.cs b/runtime/CSharp/Antlr4.Runtime/Parser.cs
index c4ac30b18..8d13cf52f 100644
--- a/runtime/CSharp/Antlr4.Runtime/Parser.cs
+++ b/runtime/CSharp/Antlr4.Runtime/Parser.cs
@@ -800,6 +800,10 @@ namespace Antlr4.Runtime
             {
                 AddContextToParseTree();
             }
+            if (_parseListeners != null)
+            {
+                TriggerEnterRuleEvent();
+            }
         }
 
         public virtual void EnterLeftFactoredRule(ParserRuleContext localctx, int state, int ruleIndex)