diff --git a/deps/teagba/src/cstartup.cpp b/deps/teagba/src/cstartup.cpp
index e3845e03..a3603465 100644
--- a/deps/teagba/src/cstartup.cpp
+++ b/deps/teagba/src/cstartup.cpp
@@ -2,6 +2,8 @@
  * Copyright 2016 - 2024 Gary Talent (gary@drinkingtea.net). All rights reserved.
  */
 
+#ifdef __GNUC__
+
 #include <ox/std/heapmgr.hpp>
 
 #include <teagba/bios.hpp>
@@ -58,3 +60,5 @@ int c_start() {
 }
 
 }
+
+#endif