diff --git a/server/src/com/cloud/api/dispatch/ParamGenericValidationWorker.java b/server/src/com/cloud/api/dispatch/ParamGenericValidationWorker.java
index 7aaafbb55fc..6509d117012 100644
--- a/server/src/com/cloud/api/dispatch/ParamGenericValidationWorker.java
+++ b/server/src/com/cloud/api/dispatch/ParamGenericValidationWorker.java
@@ -90,7 +90,7 @@ public class ParamGenericValidationWorker implements DispatchWorker {
                     break;
                 }
             }
-            if (!matchedCurrentParam) {
+            if (!matchedCurrentParam && !((String)actualParamName).equalsIgnoreCase("expires") && !((String)actualParamName).equalsIgnoreCase("signatureversion")) {
                 errorMsg.append(" ").append(actualParamName);
                 foundUnknownParam= true;
             }