diff --git a/meta-google/recipes-google/ipmi/google-ipmi-sys_git.bb b/meta-google/recipes-google/ipmi/google-ipmi-sys_git.bb
index f8af0a0..c272487 100644
--- a/meta-google/recipes-google/ipmi/google-ipmi-sys_git.bb
+++ b/meta-google/recipes-google/ipmi/google-ipmi-sys_git.bb
@@ -30,6 +30,9 @@
 SYSTEMD_PACKAGES = "${PN}"
 SYSTEMD_SERVICE_${PN} = "gbmc-psu-hardreset.target"
 
+CXXFLAGS_append_gbmc = '${@"" if not d.getVar("GBMC_NCSI_IF_NAME") else \
+  " -DNCSI_IPMI_CHANNEL=1 -DNCSI_IF_NAME=" + d.getVar("GBMC_NCSI_IF_NAME")}'
+
 do_install_append() {
 	install -d ${D}${systemd_system_unitdir}
 	install -m 0644 ${S}/gbmc-psu-hardreset.target ${D}${systemd_system_unitdir}