diff --git a/doc/sim-api.txt b/doc/sim-api.txt
index b1428b10..419d8ec3 100644
--- a/doc/sim-api.txt
+++ b/doc/sim-api.txt
@@ -79,6 +79,16 @@ Methods		dict GetProperties()
 					 [service].Error.InvalidArguments
 					 [service].Error.Failed
 
+		void SetProperty(string property, variant value)
+
+			Sets the given property value to that specified in
+			call parameter.
+
+			Possible Errors: [service].Error.InProgress
+					 [service].Error.NotImplemented
+					 [service].Error.InvalidArguments
+					 [service].Error.Failed
+
 Signals		PropertyChanged(string name, variant value)
 
 			This signal indicates a changed value of the given