diff --git a/lib/libshare/nfs.c b/lib/libshare/nfs.c
index 980e517cb..2a901bcec 100644
--- a/lib/libshare/nfs.c
+++ b/lib/libshare/nfs.c
@@ -249,6 +249,8 @@ fullerr:
 static boolean_t
 nfs_is_shared_cb(void *userdata, char *line, boolean_t found_mountpoint)
 {
+	(void) line;
+
 	boolean_t *found = userdata;
 	*found = found_mountpoint;
 	return (!found_mountpoint);
diff --git a/lib/libshare/os/freebsd/nfs.c b/lib/libshare/os/freebsd/nfs.c
index b53ff0987..494442cb5 100644
--- a/lib/libshare/os/freebsd/nfs.c
+++ b/lib/libshare/os/freebsd/nfs.c
@@ -134,6 +134,7 @@ nfs_enable_share(sa_share_impl_t impl_share)
 static int
 nfs_disable_share_impl(sa_share_impl_t impl_share, FILE *tmpfile)
 {
+	(void) impl_share, (void) tmpfile;
 	return (SA_OK);
 }
 
diff --git a/lib/libshare/os/linux/nfs.c b/lib/libshare/os/linux/nfs.c
index d6dbc158c..002c5e24c 100644
--- a/lib/libshare/os/linux/nfs.c
+++ b/lib/libshare/os/linux/nfs.c
@@ -440,6 +440,7 @@ nfs_enable_share(sa_share_impl_t impl_share)
 static int
 nfs_disable_share_impl(sa_share_impl_t impl_share, FILE *tmpfile)
 {
+	(void) impl_share, (void) tmpfile;
 	return (SA_OK);
 }