diff --git a/configure.ac b/configure.ac
index a6cdc3d..7035723 100644
--- a/configure.ac
+++ b/configure.ac
@@ -112,10 +112,6 @@
 AC_ARG_VAR(SYSTEMD_TARGET, "Target for starting this service")
 AS_IF([test "x$SYSTEMD_TARGET" == "x"], [SYSTEMD_TARGET="multi-user.target"])
 
-AC_DEFINE(SYSTEMD_BUSNAME, "org.freedesktop.systemd1", [systemd busname.])
-AC_DEFINE(SYSTEMD_PATH, "/org/freedesktop/systemd1", [systemd path.])
-AC_DEFINE(SYSTEMD_INTERFACE, "org.freedesktop.systemd1.Manager", [systemd interface.])
-
 # Create configured output.
 AC_CONFIG_FILES([Makefile test/Makefile])
 AC_CONFIG_FILES([xyz.openbmc_project.Network.service])
diff --git a/network_manager.cpp b/network_manager.cpp
index c4ab0da..4483631 100644
--- a/network_manager.cpp
+++ b/network_manager.cpp
@@ -20,6 +20,10 @@
 #include <string>
 #include <xyz/openbmc_project/Common/error.hpp>
 
+constexpr char SYSTEMD_BUSNAME[] = "org.freedesktop.systemd1";
+constexpr char SYSTEMD_PATH[] = "/org/freedesktop/systemd1";
+constexpr char SYSTEMD_INTERFACE[] = "org.freedesktop.systemd1.Manager";
+
 namespace phosphor
 {
 namespace network