diff --git a/mingw-w64-crt/crt/gccmain.c b/mingw-w64-crt/crt/gccmain.c
index fc0e350..13ef04f 100644
--- a/mingw-w64-crt/crt/gccmain.c
+++ b/mingw-w64-crt/crt/gccmain.c
@@ -49,6 +49,7 @@
 
 static int initialized = 0;
 
+__attribute__((used)) /* required for gcc -flto -Ofast */
 void
 __main (void)
 {