diff --git a/sys-kernel/hardened-kernel/hardened-kernel-5.4.48.ebuild b/sys-kernel/hardened-kernel/hardened-kernel-5.4.48.ebuild
index ae3e642..e2178c7 100644
--- a/sys-kernel/hardened-kernel/hardened-kernel-5.4.48.ebuild
+++ b/sys-kernel/hardened-kernel/hardened-kernel-5.4.48.ebuild
@@ -84,7 +84,7 @@ src_prepare() {
 src_install() {
 	kernel-build_src_install
 
-	if [[ -z "${UEFI_SB_KEY}" && -z "${UEFI_SB_CRT}" ]] ;then
+	if [[ -n "${UEFI_SB_KEY}" && -n "${UEFI_SB_CRT}" ]] ;then
 		sbsign --key ${UEFI_SB_KEY} --cert ${UEFI_SB_CRT} --output ${D}/usr/src/linux-${PV}/arch/x86/boot/bzImage.signed \
 		  ${D}/usr/src/linux-${PV}/arch/x86/boot/bzImage && \
 		mv ${D}/usr/src/linux-${PV}/arch/x86/boot/bzImage.signed ${D}/usr/src/linux-${PV}/arch/x86/boot/bzImage