diff --git a/sys/net/if.h b/sys/net/if.h
--- a/sys/net/if.h
+++ b/sys/net/if.h
@@ -657,6 +657,12 @@
 MALLOC_DECLARE(M_IFMADDR);
 #endif
 
+/*
+ * Opaque interface structure.
+ */
+
+typedef struct ifnet * if_t;
+
 extern struct sx ifnet_detach_sxlock;
 
 struct nvlist;
diff --git a/sys/net/if_var.h b/sys/net/if_var.h
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -124,8 +124,6 @@
 	IFCOUNTERS /* Array size. */
 } ift_counter;
 
-typedef struct ifnet * if_t;
-
 typedef	void (*if_start_fn_t)(if_t);
 typedef	int (*if_ioctl_fn_t)(if_t, u_long, caddr_t);
 typedef	void (*if_init_fn_t)(void *);