diff --git a/registry/rest-registry.go b/registry/rest-registry.go
index fba1a18..763bb40 100644
--- a/registry/rest-registry.go
+++ b/registry/rest-registry.go
@@ -116,7 +116,7 @@ func (rr *restRegistry) InvokeWithBytes(method string, params [][]byte, leadingP
 		}
 
 		for indexC := 0; indexC < len(params); indexC++ {
-			if pValues[indexC+lParamLen].Type().Kind() != reflect.String {
+			if pValues[indexC+lParamLen].Elem().Type().Kind() != reflect.String {
 				_params = append(_params, string(params[indexC]))
 				continue
 			}