diff --git a/sys/vm/vm_page.h b/sys/vm/vm_page.h
--- a/sys/vm/vm_page.h
+++ b/sys/vm/vm_page.h
@@ -608,7 +608,6 @@
 void vm_page_advise(vm_page_t m, int advice);
 vm_page_t vm_page_mpred(vm_object_t, vm_pindex_t);
 vm_page_t vm_page_alloc(vm_object_t, vm_pindex_t, int);
-vm_page_t vm_page_alloc_after(vm_object_t, vm_pindex_t, int, vm_page_t);
 vm_page_t vm_page_alloc_domain_after(vm_object_t, vm_pindex_t, int, int,
     vm_page_t);
 vm_page_t vm_page_alloc_contig(vm_object_t object, vm_pindex_t pindex, int req,
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -162,6 +162,8 @@
 
 static uma_zone_t fakepg_zone;
 
+static vm_page_t vm_page_alloc_after(vm_object_t object, vm_pindex_t pindex,
+    int req, vm_page_t mpred);
 static void vm_page_alloc_check(vm_page_t m);
 static vm_page_t vm_page_alloc_nofree_domain(int domain, int req);
 static bool _vm_page_busy_sleep(vm_object_t obj, vm_page_t m,
@@ -2085,7 +2087,7 @@
  * the resident page in the object with largest index smaller than the given
  * page index, or NULL if no such page exists.
  */
-vm_page_t
+static vm_page_t
 vm_page_alloc_after(vm_object_t object, vm_pindex_t pindex,
     int req, vm_page_t mpred)
 {