diff --git a/sys/dev/netmap/netmap_mem2.c b/sys/dev/netmap/netmap_mem2.c
--- a/sys/dev/netmap/netmap_mem2.c
+++ b/sys/dev/netmap/netmap_mem2.c
@@ -312,7 +312,7 @@
 
 static int netmap_mem_map(struct netmap_obj_pool *, struct netmap_adapter *);
 static int netmap_mem_unmap(struct netmap_obj_pool *, struct netmap_adapter *);
-static int nm_mem_check_group(struct netmap_mem_d *, struct device *);
+static int nm_mem_check_group(struct netmap_mem_d *, bus_dma_tag_t);
 static void nm_mem_release_id(struct netmap_mem_d *);
 
 nm_memid_t
@@ -730,7 +730,7 @@
 }
 
 static int
-nm_mem_check_group(struct netmap_mem_d *nmd, struct device *dev)
+nm_mem_check_group(struct netmap_mem_d *nmd, bus_dma_tag_t dev)
 {
 	int err = 0, id;