diff --git a/src/osx/webrequest_urlsession.mm b/src/osx/webrequest_urlsession.mm
index 84cfcc643e..2fc6ee6e12 100644
--- a/src/osx/webrequest_urlsession.mm
+++ b/src/osx/webrequest_urlsession.mm
@@ -34,7 +34,7 @@
 
 @implementation wxWebSessionDelegate
 
-- initWithSession:(wxWebSessionURLSession*)session
+- (id)initWithSession:(wxWebSessionURLSession*)session
 {
     m_session = session;
     m_requests = [[NSMapTable weakToStrongObjectsMapTable] retain];