diff --git a/SPECS/kernel.spec b/SPECS/kernel.spec
index 53cead2..0c19a7f 100644
--- a/SPECS/kernel.spec
+++ b/SPECS/kernel.spec
@@ -15,7 +15,7 @@
 %global distro_build 513
 
 # Sign the x86_64 kernel for secure boot authentication
-%ifarch x86_64 aarch64
+%ifarch x86_64 aarch64 s390x ppc64le
 %global signkernel 1
 %else
 %global signkernel 0