diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index c7b723c18620..c7caffb31935 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -3346,6 +3346,8 @@ static int nfs_open_permission_mask(int openflags)
 			mask |= MAY_READ;
 		if ((openflags & O_ACCMODE) != O_RDONLY)
 			mask |= MAY_WRITE;
+		if (openflags & O_TRUNC)
+			mask |= MAY_WRITE;
 	}
 
 	return mask;