diff --git a/sys/fs/nfs/nfs_commonkrpc.c b/sys/fs/nfs/nfs_commonkrpc.c
index 4307afd6ca7b..b2c396254de2 100644
--- a/sys/fs/nfs/nfs_commonkrpc.c
+++ b/sys/fs/nfs/nfs_commonkrpc.c
@@ -96,7 +96,6 @@ extern int nfscl_ticks;
 extern void (*ncl_call_invalcaches)(struct vnode *);
 extern int nfs_numnfscbd;
 extern int nfscl_debuglevel;
-extern int maxbcachebuf;
 
 SVCPOOL		*nfscbd_pool;
 static int	nfsrv_gsscallbackson = 0;
diff --git a/sys/fs/nfsclient/nfs_clvfsops.c b/sys/fs/nfsclient/nfs_clvfsops.c
index 15838827902c..f1d245661c49 100644
--- a/sys/fs/nfsclient/nfs_clvfsops.c
+++ b/sys/fs/nfsclient/nfs_clvfsops.c
@@ -83,7 +83,6 @@ extern int nfscl_debuglevel;
 extern enum nfsiod_state ncl_iodwant[NFS_MAXASYNCDAEMON];
 extern struct nfsmount *ncl_iodmount[NFS_MAXASYNCDAEMON];
 extern struct mtx ncl_iod_mutex;
-extern int maxbcachebuf;
 NFSCLSTATEMUTEX;
 
 MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "NFS request header");
diff --git a/sys/sys/buf.h b/sys/sys/buf.h
index 830fb05491d4..58bd91e34ff9 100644
--- a/sys/sys/buf.h
+++ b/sys/sys/buf.h
@@ -472,6 +472,7 @@ buf_track(struct buf *bp, const char *location)
 extern int	nbuf;			/* The number of buffer headers */
 extern long	maxswzone;		/* Max KVA for swap structures */
 extern long	maxbcache;		/* Max KVA for buffer cache */
+extern int	maxbcachebuf;		/* Max buffer cache block size */
 extern long	runningbufspace;
 extern long	hibufspace;
 extern int	dirtybufthresh;