diff --git a/lib/compile/index.js b/lib/compile/index.js
index 9c522b3..3fa8f7c 100644
--- a/lib/compile/index.js
+++ b/lib/compile/index.js
@@ -2,6 +2,7 @@ const csdl2openapi = require('./csdl2openapi')
 const cds = require('@sap/cds/lib');
 const fs = require("fs");
 const DEBUG = cds.debug('openapi');
+const supportedProtocols = ["rest", "odata", "odata-v4"];
 
 module.exports = function processor(csn, options = {}) {
   const edmOptions = Object.assign({
@@ -148,17 +149,24 @@ function _getProtocols(csdl, csn, odataVersion) {
       throw new Error(
         `Service "${serviceName}" is annotated with @protocol:'none' which is not supported in openAPI generation.`
       );
-    } else if (
-      service["@protocol"] === "rest" ||
-      service["@protocol"] === "odata" || service["@protocol"] === "odata-v4"
-    ) {
+    } else if (supportedProtocols.includes(service["@protocol"])) {
       protocols.push(service["@protocol"]);
     } else if (Array.isArray(service["@protocol"])) {
       service["@protocol"].forEach((protocol) => {
-        if (protocol === "rest" || protocol === "odata" || protocol === "odata-v4") {
-          protocols.push(protocol);
+        if(typeof protocol === "string"){
+          if (supportedProtocols.includes(protocol)) {
+            protocols.push(protocol);
+          } else {
+            DEBUG?.(`"${protocol}" protocol is not supported`);
+          }
+        } else if (typeof protocol === "object" && !Array.isArray(protocol) && protocol !== null) {
+          if(supportedProtocols.includes(protocol.kind)) {
+            protocols.push(protocol.kind);
+          } else {
+            DEBUG?.(`"${protocol.kind}" protocol is not supported`);
+          }
         } else {
-          DEBUG?.(`"${protocol}" protocol is not supported`);
+          DEBUG?.(`incorrect ${protocol} type`)
         }
       });
     }
@@ -184,4 +192,4 @@ function _servicePath(csdl, csn, protocols) {
 
     return paths;
   }
-}
\ No newline at end of file
+}