diff --git a/src/core/Akka/Event/Logging.cs b/src/core/Akka/Event/Logging.cs
index 9900557d1b7..05d334b8eac 100644
--- a/src/core/Akka/Event/Logging.cs
+++ b/src/core/Akka/Event/Logging.cs
@@ -270,7 +270,7 @@ public static LogLevel LogLevelFor(string logLevel)
         {
             if (!string.IsNullOrEmpty(logLevel))
             {
-                logLevel = logLevel.ToUpper();
+                logLevel = logLevel.ToUpperInvariant();
             }
 
             switch (logLevel)