diff --git a/libnm/nm-device.c b/libnm/nm-device.c
index 5965cb3b8f..6586140f96 100644
--- a/libnm/nm-device.c
+++ b/libnm/nm-device.c
@@ -2765,7 +2765,7 @@ nm_lldp_neighbor_get_attr_names (NMLldpNeighbor *neighbor)
  * Since: 1.2
  **/
 gboolean
-nm_lldp_neighbor_get_attr_string_value (NMLldpNeighbor *neighbor, char *name,
+nm_lldp_neighbor_get_attr_string_value (NMLldpNeighbor *neighbor, const char *name,
                                         const char **out_value)
 {
 	GVariant *variant;
@@ -2795,7 +2795,7 @@ nm_lldp_neighbor_get_attr_string_value (NMLldpNeighbor *neighbor, char *name,
  * Since: 1.2
  **/
 gboolean
-nm_lldp_neighbor_get_attr_uint_value (NMLldpNeighbor *neighbor, char *name,
+nm_lldp_neighbor_get_attr_uint_value (NMLldpNeighbor *neighbor, const char *name,
                                       guint *out_value)
 {
 	GVariant *variant;
@@ -2824,7 +2824,7 @@ nm_lldp_neighbor_get_attr_uint_value (NMLldpNeighbor *neighbor, char *name,
  * Since: 1.2
  **/
 const GVariantType *
-nm_lldp_neighbor_get_attr_type (NMLldpNeighbor *neighbor, char *name)
+nm_lldp_neighbor_get_attr_type (NMLldpNeighbor *neighbor, const char *name)
 {
 	GVariant *variant;
 
diff --git a/libnm/nm-device.h b/libnm/nm-device.h
index fcda93abcc..9d31d38a44 100644
--- a/libnm/nm-device.h
+++ b/libnm/nm-device.h
@@ -227,13 +227,13 @@ void nm_lldp_neighbor_unref (NMLldpNeighbor *neighbor);
 NM_AVAILABLE_IN_1_2
 char **nm_lldp_neighbor_get_attr_names (NMLldpNeighbor *neighbor);
 NM_AVAILABLE_IN_1_2
-gboolean nm_lldp_neighbor_get_attr_string_value (NMLldpNeighbor *neighbor, char *name,
+gboolean nm_lldp_neighbor_get_attr_string_value (NMLldpNeighbor *neighbor, const char *name,
                                                  const char **out_value);
 NM_AVAILABLE_IN_1_2
-gboolean nm_lldp_neighbor_get_attr_uint_value (NMLldpNeighbor *neighbor, char *name,
+gboolean nm_lldp_neighbor_get_attr_uint_value (NMLldpNeighbor *neighbor, const char *name,
                                                guint *out_value);
 NM_AVAILABLE_IN_1_2
-const GVariantType *nm_lldp_neighbor_get_attr_type (NMLldpNeighbor *neighbor, char *name);
+const GVariantType *nm_lldp_neighbor_get_attr_type (NMLldpNeighbor *neighbor, const char *name);
 
 G_END_DECLS