diff --git a/pkg/constants/constants.go b/pkg/constants/constants.go
index 932eb47d776..0548444eea0 100644
--- a/pkg/constants/constants.go
+++ b/pkg/constants/constants.go
@@ -313,10 +313,10 @@ func ISOLoaderPath(arch string) string {
 
 // ISOKernelPath returns path use to store the kernel
 func ISOKernelPath(arch string) string {
-	return ISOLoaderPath(arch) + "linux"
+	return filepath.Join(ISOLoaderPath(arch), "linux")
 }
 
 // ISOInitrdPath returns path use to store the initramfs
 func ISOInitrdPath(arch string) string {
-	return ISOLoaderPath(arch) + "initrd"
+	return filepath.Join(ISOLoaderPath(arch), "initrd")
 }