diff --git a/common/recipes-phosphor/dbus/phosphor-mapper/xyz.openbmc_project.ObjectMapper.service b/common/recipes-phosphor/dbus/phosphor-mapper/xyz.openbmc_project.ObjectMapper.service
index a9a7984..ccaaa98 100644
--- a/common/recipes-phosphor/dbus/phosphor-mapper/xyz.openbmc_project.ObjectMapper.service
+++ b/common/recipes-phosphor/dbus/phosphor-mapper/xyz.openbmc_project.ObjectMapper.service
@@ -7,7 +7,7 @@
 Type=dbus
 ExecStart={sbindir}/phosphor-mapper \
         --path_namespaces="${{MAPPER_NAMESPACES}}" \
-        --interface_namespaces="${{MAPPER_INTERFACES}}"
+        --interface_namespaces="${{MAPPER_INTERFACES}}" \
         --blacklists="${{MAPPER_BLACKLISTS}}" \
         --interface_blacklists="${{MAPPER_INTERFACEBLACKLISTS}}"
 BusName={BUSNAME}