diff --git a/li.strolch.agent/src/main/java/li/strolch/runtime/configuration/RuntimeConfiguration.java b/li.strolch.agent/src/main/java/li/strolch/runtime/configuration/RuntimeConfiguration.java
index 5dbe92882..58fe30c75 100644
--- a/li.strolch.agent/src/main/java/li/strolch/runtime/configuration/RuntimeConfiguration.java
+++ b/li.strolch.agent/src/main/java/li/strolch/runtime/configuration/RuntimeConfiguration.java
@@ -66,7 +66,7 @@ public class RuntimeConfiguration extends AbstractionConfiguration {
 		this.dataPath = dataPathF;
 		this.tempPath = tempPathF;
 
-		this.locale = new Locale(getString(PROP_LOCALE, Locale.getDefault().toString()));
+		this.locale = new Locale(getString(PROP_LOCALE, Locale.getDefault().toLanguageTag()));
 	}
 
 	public String getApplicationName() {