diff --git a/src/App.h b/src/App.h
index 685581b7f..360fa5fe6 100644
--- a/src/App.h
+++ b/src/App.h
@@ -571,7 +571,7 @@ struct TemplatedApp {
     }
 
     /* Register event handler for accepted FD. Can be used together with adoptSocket. */
-    BuilderPatternReturnType &&preOpen(LIBUS_SOCKET_DESCRIPTOR (*handler)(LIBUS_SOCKET_DESCRIPTOR)) {
+    BuilderPatternReturnType &&preOpen(LIBUS_SOCKET_DESCRIPTOR (*handler)(struct us_socket_context_t *, LIBUS_SOCKET_DESCRIPTOR)) {
         httpContext->onPreOpen(handler);
         return std::move(static_cast<BuilderPatternReturnType &&>(*this));
     }
diff --git a/src/HttpContext.h b/src/HttpContext.h
index 838830244..a5db82b49 100644
--- a/src/HttpContext.h
+++ b/src/HttpContext.h
@@ -489,7 +489,7 @@ struct HttpContext {
         return us_socket_context_listen_unix(SSL, getSocketContext(), path, options, sizeof(HttpResponseData<SSL>));
     }
 
-    void onPreOpen(LIBUS_SOCKET_DESCRIPTOR (*handler)(LIBUS_SOCKET_DESCRIPTOR)) {
+    void onPreOpen(LIBUS_SOCKET_DESCRIPTOR (*handler)(struct us_socket_context_t *, LIBUS_SOCKET_DESCRIPTOR)) {
         us_socket_context_on_pre_open(SSL, getSocketContext(), handler);
     }
 
diff --git a/src/LocalCluster.h b/src/LocalCluster.h
index 81feffc91..f59a8d189 100644
--- a/src/LocalCluster.h
+++ b/src/LocalCluster.h
@@ -34,7 +34,7 @@ struct LocalCluster {
 
                 cb(*app);
                 
-                app->preOpen([](LIBUS_SOCKET_DESCRIPTOR fd) -> LIBUS_SOCKET_DESCRIPTOR {
+                app->preOpen([](struct us_socket_context_t *context, LIBUS_SOCKET_DESCRIPTOR fd) -> LIBUS_SOCKET_DESCRIPTOR {
 
                     /* Distribute this socket in round robin fashion */
                     //std::cout << "About to load balance " << fd << " to " << roundRobin << std::endl;
diff --git a/uSockets b/uSockets
index 1764b9aef..89db1704d 160000
--- a/uSockets
+++ b/uSockets
@@ -1 +1 @@
-Subproject commit 1764b9aefade5381152796ca07ec41d8bbf70c36
+Subproject commit 89db1704ddb1ece2aa447f550c863ba5524e0e4d