diff --git a/spec/resources/vissv3.0.proto b/spec/resources/vissv3.0.proto
index f0a0ac1..5638a97 100644
--- a/spec/resources/vissv3.0.proto
+++ b/spec/resources/vissv3.0.proto
@@ -24,7 +24,7 @@ service VISS {
 message ErrorResponseMessage {
     string Number = 1;
     optional string Reason = 2;
-    optional string Message = 3;
+    optional string Description = 3;
 }
 
 message FilterExpressions {