diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc
index 5a6e213936..bfcda76c24 100644
--- a/meta/recipes-bsp/grub/grub2.inc
+++ b/meta/recipes-bsp/grub/grub2.inc
@@ -128,6 +128,8 @@ GRUBPLATFORM ??= "pc"
 
 inherit autotools gettext texinfo pkgconfig
 
+CFLAGS_remove = "-O2"
+
 EXTRA_OECONF = "--with-platform=${GRUBPLATFORM} \
                 --disable-grub-mkfont \
                 --program-prefix="" \