diff --git a/src/systemd/nm-sd-adapt.h b/src/systemd/nm-sd-adapt.h
index c392879c03..03fda64136 100644
--- a/src/systemd/nm-sd-adapt.h
+++ b/src/systemd/nm-sd-adapt.h
@@ -47,12 +47,13 @@ _slog_level_to_nm (int slevel)
 
 #define log_internal(level, error, file, line, func, format, ...) \
 ({ \
-	int _nm_e = (error); \
-	NMLogLevel _nm_l = _slog_level_to_nm ((level)); \
+	const int _nm_e = (error); \
+	const NMLogLevel _nm_l = _slog_level_to_nm ((level)); \
+	\
 	if (nm_logging_enabled (_nm_l, LOGD_DHCP)) { \
 		const char *_nm_location = strrchr ((""file), '/'); \
 		\
-		_nm_log_impl (_nm_location ? _nm_location + 1 : (""file), (line), (func), _nm_l, LOGD_DHCP, _nm_e, ("%s"format), "sd-dhcp: ", ## __VA_ARGS__); \
+		_nm_log_impl (_nm_location ? _nm_location + 1 : (""file), (line), (func), _nm_l, LOGD_DHCP, _nm_e, ("%s"format), "libsystemd: ", ## __VA_ARGS__); \
 	} \
 	(_nm_e > 0 ? -_nm_e : _nm_e); \
 })