diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index cc60b3cff..0c4953e3a 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1368,7 +1368,7 @@ bool GUI_App::on_init_inner()
         // and wxEVT_SET_FOCUS before GUI_App::post_init is called) wasn't called before GUI_App::post_init and OpenGL wasn't initialized.
         // Since issue #9774 Where same problem occured on MacOS Ventura, we decided to have this check on MacOS as well.
 
-#ifdef __linux__ || __APPLE__
+#if defined(__linux__) || defined(__APPLE__)
         if (!m_post_initialized && m_opengl_initialized) {
 #else
         if (!m_post_initialized) {