diff --git a/li.strolch.service/src/main/java/li/strolch/service/StringMapArgument.java b/li.strolch.service/src/main/java/li/strolch/service/StringMapArgument.java
new file mode 100644
index 000000000..6c0618bd9
--- /dev/null
+++ b/li.strolch.service/src/main/java/li/strolch/service/StringMapArgument.java
@@ -0,0 +1,11 @@
+package li.strolch.service;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import li.strolch.service.api.ServiceArgument;
+
+public class StringMapArgument extends ServiceArgument {
+	private static final long serialVersionUID = 1L;
+	public Map<String, String> map = new HashMap<>();
+}