diff --git a/src/devices/wwan/nm-modem-broadband.c b/src/devices/wwan/nm-modem-broadband.c
index 105cf4ddf3..e72b75923c 100644
--- a/src/devices/wwan/nm-modem-broadband.c
+++ b/src/devices/wwan/nm-modem-broadband.c
@@ -30,6 +30,8 @@
 #include "nm-device-private.h"
 #include "nm-platform.h"
 
+#define NM_MODEM_BROADBAND_MODEM "modem"
+
 G_DEFINE_TYPE (NMModemBroadband, nm_modem_broadband, NM_TYPE_MODEM)
 
 typedef enum {
diff --git a/src/devices/wwan/nm-modem-broadband.h b/src/devices/wwan/nm-modem-broadband.h
index a54e63a697..371607782b 100644
--- a/src/devices/wwan/nm-modem-broadband.h
+++ b/src/devices/wwan/nm-modem-broadband.h
@@ -32,8 +32,6 @@ G_BEGIN_DECLS
 #define NM_IS_MODEM_BROADBAND_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  NM_TYPE_MODEM_BROADBAND))
 #define NM_MODEM_BROADBAND_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  NM_TYPE_MODEM_BROADBAND, NMModemBroadbandClass))
 
-#define NM_MODEM_BROADBAND_MODEM "modem"
-
 typedef struct _NMModemBroadband        NMModemBroadband;
 typedef struct _NMModemBroadbandClass   NMModemBroadbandClass;
 typedef struct _NMModemBroadbandPrivate NMModemBroadbandPrivate;