diff --git a/sys/fs/procfs/procfs_mem.c b/sys/fs/procfs/procfs_mem.c
index ebfe53b8665..b7eed8503ea 100644
--- a/sys/fs/procfs/procfs_mem.c
+++ b/sys/fs/procfs/procfs_mem.c
@@ -54,6 +54,7 @@
 #include <vm/vm_param.h>
 #include <sys/lock.h>
 #include <vm/pmap.h>
+#include <vm/vm_extern.h>
 #include <vm/vm_map.h>
 #include <vm/vm_kern.h>
 #include <vm/vm_object.h>
diff --git a/sys/miscfs/procfs/procfs_mem.c b/sys/miscfs/procfs/procfs_mem.c
index ebfe53b8665..b7eed8503ea 100644
--- a/sys/miscfs/procfs/procfs_mem.c
+++ b/sys/miscfs/procfs/procfs_mem.c
@@ -54,6 +54,7 @@
 #include <vm/vm_param.h>
 #include <sys/lock.h>
 #include <vm/pmap.h>
+#include <vm/vm_extern.h>
 #include <vm/vm_map.h>
 #include <vm/vm_kern.h>
 #include <vm/vm_object.h>