diff --git a/sys/fs/nfsclient/nfs_clport.c b/sys/fs/nfsclient/nfs_clport.c
--- a/sys/fs/nfsclient/nfs_clport.c
+++ b/sys/fs/nfsclient/nfs_clport.c
@@ -1438,6 +1438,14 @@
 	nfscl_modevent,
 	NULL,
 };
+/*
+ * This is the main module declaration for the NFS client.  The
+ * nfscl_modevent() function is needed to ensure that the module
+ * cannot be unloaded, among other things.
+ * There is also a module declaration in sys/fs/nfsclient/nfs_clvfsops.c
+ * for the name "nfs" within the VFS_SET() macro that defines the "nfs"
+ * file system type.
+ */
 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST);
 
 /* So that loader and kldload(2) can find us, wherever we are.. */
@@ -1445,3 +1453,4 @@
 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1);
 MODULE_DEPEND(nfscl, krpc, 1, 1, 1);
 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1);
+MODULE_DEPEND(nfscl, xdr, 1, 1, 1);
diff --git a/sys/fs/nfsclient/nfs_clvfsops.c b/sys/fs/nfsclient/nfs_clvfsops.c
--- a/sys/fs/nfsclient/nfs_clvfsops.c
+++ b/sys/fs/nfsclient/nfs_clvfsops.c
@@ -52,7 +52,6 @@
 #include <sys/lock.h>
 #include <sys/malloc.h>
 #include <sys/mbuf.h>
-#include <sys/module.h>
 #include <sys/mount.h>
 #include <sys/proc.h>
 #include <sys/socket.h>
@@ -148,14 +147,17 @@
 	.vfs_sysctl =		nfs_sysctl,
 	.vfs_purge =		nfs_purge,
 };
+/*
+ * This macro declares that the file system type is named "nfs".
+ * It also declares a module name of "nfs" and uses vfs_modevent()
+ * as the event handling function.
+ * The main module declaration is found in sys/fs/nfsclient/nfs_clport.c
+ * for "nfscl" and is needed so that a custom event handling
+ * function gets called.  MODULE_DEPEND() macros are found there.
+ */
 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK | VFCF_SBDRY);
 
-/* So that loader and kldload(2) can find us, wherever we are.. */
 MODULE_VERSION(nfs, 1);
-MODULE_DEPEND(nfs, nfscommon, 1, 1, 1);
-MODULE_DEPEND(nfs, krpc, 1, 1, 1);
-MODULE_DEPEND(nfs, nfssvc, 1, 1, 1);
-MODULE_DEPEND(nfs, xdr, 1, 1, 1);
 
 /*
  * This structure is now defined in sys/nfs/nfs_diskless.c so that it