diff --git a/sys-boot/grub/grub-2.06-r7.ebuild b/sys-boot/grub/grub-2.06-r7.ebuild
index 15a8221a1c137..3a2f6087bcedb 100644
--- a/sys-boot/grub/grub-2.06-r7.ebuild
+++ b/sys-boot/grub/grub-2.06-r7.ebuild
@@ -316,6 +316,7 @@ pkg_postinst() {
 			if ver_test -gt ${v}; then
 				ewarn
 				ewarn "Re-run grub-install to update installed boot code!"
+				ewarn "Re-run grub-mkconfig to update grub.cfg!"
 				ewarn
 				break
 			fi
diff --git a/sys-boot/grub/grub-9999.ebuild b/sys-boot/grub/grub-9999.ebuild
index 359da219ea62f..e10ab779e8e65 100644
--- a/sys-boot/grub/grub-9999.ebuild
+++ b/sys-boot/grub/grub-9999.ebuild
@@ -306,6 +306,7 @@ pkg_postinst() {
 			if ver_test -gt ${v}; then
 				ewarn
 				ewarn "Re-run grub-install to update installed boot code!"
+				ewarn "Re-run grub-mkconfig to update grub.cfg!"
 				ewarn
 				break
 			fi