diff --git a/samples/client/petstore/objc/SwaggerClient/SWGPetApi.h b/samples/client/petstore/objc/SwaggerClient/SWGPetApi.h
index e009300993d..39f23edb028 100644
--- a/samples/client/petstore/objc/SwaggerClient/SWGPetApi.h
+++ b/samples/client/petstore/objc/SwaggerClient/SWGPetApi.h
@@ -113,13 +113,13 @@
 /// Deletes a pet
 /// 
 ///
-/// @param apiKey 
 /// @param petId Pet id to delete
+/// @param apiKey 
 /// 
 ///
 /// @return 
--(NSNumber*) deletePetWithCompletionBlock :(NSString*) apiKey 
-     petId:(NSNumber*) petId 
+-(NSNumber*) deletePetWithCompletionBlock :(NSNumber*) petId 
+     apiKey:(NSString*) apiKey 
     
     
     completionHandler: (void (^)(NSError* error))completionBlock;
diff --git a/samples/client/petstore/objc/SwaggerClient/SWGPetApi.m b/samples/client/petstore/objc/SwaggerClient/SWGPetApi.m
index 4e67e2c1435..15f4af0564e 100644
--- a/samples/client/petstore/objc/SwaggerClient/SWGPetApi.m
+++ b/samples/client/petstore/objc/SwaggerClient/SWGPetApi.m
@@ -594,14 +594,14 @@ static NSString * basePath = @"http://petstore.swagger.io/v2";
 ///
 /// Deletes a pet
 /// 
-///  @param apiKey 
-///
 ///  @param petId Pet id to delete
 ///
+///  @param apiKey 
+///
 ///  @returns void
 ///
--(NSNumber*) deletePetWithCompletionBlock: (NSString*) apiKey
-         petId: (NSNumber*) petId
+-(NSNumber*) deletePetWithCompletionBlock: (NSNumber*) petId
+         apiKey: (NSString*) apiKey
         
         
         completionHandler: (void (^)(NSError* error))completionBlock { 
diff --git a/samples/client/petstore/objc/SwaggerClientTests/Tests/PetApiTest.m b/samples/client/petstore/objc/SwaggerClientTests/Tests/PetApiTest.m
index f14e7e5b0ed..f861cb0605e 100644
--- a/samples/client/petstore/objc/SwaggerClientTests/Tests/PetApiTest.m
+++ b/samples/client/petstore/objc/SwaggerClientTests/Tests/PetApiTest.m
@@ -199,7 +199,7 @@
         if(error){
             XCTFail(@"got error %@", error);
         }
-        [api deletePetWithCompletionBlock:@"" petId:[NSString stringWithFormat:@"%@", [pet _id]] completionHandler:^(NSError *error) {
+        [api deletePetWithCompletionBlock:pet._id apiKey:@"" completionHandler:^(NSError *error) {
             if(error){
                 XCTFail(@"got error %@", error);
             }