diff --git a/CHANGELOG b/CHANGELOG
index 85cc370..add68aa 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -23,6 +23,7 @@ xx/xx/2018 autofs-5.1.5
 - tiny patch for autofs typo and possible bug.
 - add units After line to include statd service.
 - use systemd sd_notify() at startup.
+- fix NFS version mask usage.
 
 19/12/2017 autofs-5.1.4
 - fix spec file url.
diff --git a/include/replicated.h b/include/replicated.h
index 0f482d2..95ff1f0 100644
--- a/include/replicated.h
+++ b/include/replicated.h
@@ -26,7 +26,9 @@
 #define NFS2_SUPPORTED		0x0010
 #define NFS3_SUPPORTED		0x0020
 #define NFS4_SUPPORTED		0x0040
-#define NFS_VERS_MASK		(NFS3_SUPPORTED)
+#define NFS_VERS_DEFAULT	(NFS3_SUPPORTED)
+#define NFS_VERS_MASK		(NFS2_SUPPORTED|NFS3_SUPPORTED)
+#define NFS4_VERS_DEFAULT	(NFS4_SUPPORTED)
 #define NFS4_VERS_MASK		(NFS4_SUPPORTED)
 
 #define NFS2_REQUESTED		NFS2_SUPPORTED
@@ -39,6 +41,7 @@
 #define UDP_REQUESTED		UDP_SUPPORTED
 #define TCP6_REQUESTED		0x0100
 #define UDP6_REQUESTED		0x0200
+#define NFS_PROTO_DEFAULT	(TCP_SUPPORTED|UDP_SUPPORTED)
 #define NFS_PROTO_MASK		(TCP_SUPPORTED|UDP_SUPPORTED)
 
 #define NFS2_TCP_SUPPORTED	NFS2_SUPPORTED
diff --git a/modules/mount_nfs.c b/modules/mount_nfs.c
index 4cf0cd2..426c27b 100644
--- a/modules/mount_nfs.c
+++ b/modules/mount_nfs.c
@@ -86,11 +86,11 @@ int mount_mount(struct autofs_point *ap, const char *root, const char *name, int
 	      root, name, what, fstype, options);
 
 	mount_default_proto = defaults_get_mount_nfs_default_proto();
-	vers = NFS_VERS_MASK | NFS_PROTO_MASK;
+	vers = NFS_VERS_DEFAULT | NFS_PROTO_DEFAULT;
 	if (strcmp(fstype, "nfs4") == 0)
-		vers = NFS4_VERS_MASK | TCP_SUPPORTED;
+		vers = NFS4_VERS_DEFAULT | TCP_SUPPORTED;
 	else if (mount_default_proto == 4)
-		vers = vers | NFS4_VERS_MASK;
+		vers = vers | NFS4_VERS_DEFAULT;
 
 	/* Extract "nosymlink" pseudo-option which stops local filesystems
 	 * from being symlinked.