diff --git a/Rules/AvoidLongLines.cs b/Rules/AvoidLongLines.cs
index e0860a75e..ad527bb37 100644
--- a/Rules/AvoidLongLines.cs
+++ b/Rules/AvoidLongLines.cs
@@ -132,7 +132,7 @@ public override RuleSeverity GetSeverity()
         /// Gets the severity of the returned diagnostic record: error, warning, or information.
         /// </summary>
         /// <returns></returns>
-        public DiagnosticSeverity GetDiagnosticSeverity()
+        private DiagnosticSeverity GetDiagnosticSeverity()
         {
             return DiagnosticSeverity.Warning;
         }