diff --git a/configure.ac b/configure.ac
index bea6f98..f8c2ef8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -105,10 +105,6 @@
     AC_DEFINE([LINK_LOCAL_AUTOCONFIGURATION], [1], [Enable link-local IP address autoconfiguration])
 fi
 
-AC_ARG_VAR(DNS_ENTRY_FILE, [File having DNS entries supplied by DHCP])
-AS_IF([test "x$DNS_ENTRY_FILE" == "x"], [DNS_ENTRY_FILE="/run/systemd/netif/state"])
-AC_DEFINE_UNQUOTED([DNS_ENTRY_FILE], ["$DNS_ENTRY_FILE"], [File having DNS entries supplied by DHCP])
-
 AC_ARG_VAR(BUSNAME_NETWORK, [The Dbus busname to own])
 AS_IF([test "x$BUSNAME_NETWORK" == "x"], [BUSNAME_NETWORK="xyz.openbmc_project.Network"])
 AC_DEFINE_UNQUOTED([BUSNAME_NETWORK], ["$BUSNAME_NETWORK"], [The DBus busname to own])
@@ -117,10 +113,6 @@
 AS_IF([test "x$OBJ_NETWORK" == "x"], [OBJ_NETWORK="/xyz/openbmc_project/network"])
 AC_DEFINE_UNQUOTED([OBJ_NETWORK], ["$OBJ_NETWORK"], [The network manager DBus object path])
 
-AC_ARG_VAR(NETWORK_CONF_DIR, [Network configuration directory])
-AS_IF([test "x$NETWORK_CONF_DIR" == "x"], [NETWORK_CONF_DIR="/etc/systemd/network"])
-AC_DEFINE_UNQUOTED([NETWORK_CONF_DIR], ["$NETWORK_CONF_DIR"], [Network configuration directory])
-
 AC_ARG_VAR(SYSTEMD_TARGET, "Target for starting this service")
 AS_IF([test "x$SYSTEMD_TARGET" == "x"], [SYSTEMD_TARGET="multi-user.target"])
 
diff --git a/network_manager_main.cpp b/network_manager_main.cpp
index dfaeecc..3dcefe5 100644
--- a/network_manager_main.cpp
+++ b/network_manager_main.cpp
@@ -23,6 +23,9 @@
 using phosphor::logging::log;
 using sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
 
+constexpr char NETWORK_STATE_FILE[] = "/run/systemd/netif/state";
+constexpr char NETWORK_CONF_DIR[] = "/etc/systemd/network";
+
 namespace phosphor
 {
 namespace network
@@ -133,7 +136,7 @@
 
     // DNS entry handler
     phosphor::network::inotify::Watch watch(
-        eventPtr, DNS_ENTRY_FILE,
+        eventPtr, NETWORK_STATE_FILE,
         std::bind(&phosphor::network::dns::updater::processDNSEntries,
                   std::placeholders::_1));
 
@@ -141,7 +144,7 @@
     // events. However, if the file is already populated before this, then
     // they won't ever get notified and thus we need to read once before
     // waiting on change events
-    phosphor::network::dns::updater::processDNSEntries(DNS_ENTRY_FILE);
+    phosphor::network::dns::updater::processDNSEntries(NETWORK_STATE_FILE);
 
     sd_event_loop(eventPtr.get());
 }