diff --git a/ipxe/boot.ipxe.tmpl b/ipxe/boot.ipxe.tmpl
index bf94c18..96fe21b 100644
--- a/ipxe/boot.ipxe.tmpl
+++ b/ipxe/boot.ipxe.tmpl
@@ -6,12 +6,14 @@ it. Mirrors how Cobbler generated a per-MAC gPXE script carrying inst.ks=.
 
 KernelURL/InitrdURL/RepoURL come from the selected catalog entry (artifactapi
 remote); KernelArgs are the catalog's extra args. KickstartURL uses
-BOOTAPI_BASE_URL (http://).
+BOOTAPI_BASE_URL (http://). inst.ks.sendmac makes anaconda send its interface
+MACs as X-RHN-Provisioning-MAC-N headers when fetching the kickstart (Cobbler
+parity; lets /ks resolve a host by MAC as well as by name).
 */ -}}
 #!ipxe
 echo bootapi: provisioning {{ .FQDN }} ({{ .Platform }})
 {{ if and .KernelURL .InitrdURL -}}
-kernel {{ .KernelURL }} initrd=initrd.img{{ if .RepoURL }} inst.repo={{ .RepoURL }}{{ end }} inst.ks={{ .KickstartURL }} ip=dhcp{{ range .KernelArgs }} {{ . }}{{ end }}
+kernel {{ .KernelURL }} initrd=initrd.img{{ if .RepoURL }} inst.repo={{ .RepoURL }}{{ end }} inst.ks.sendmac inst.ks={{ .KickstartURL }} ip=dhcp{{ range .KernelArgs }} {{ . }}{{ end }}
 initrd {{ .InitrdURL }}
 boot
 {{- else -}}