diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index b1efd2af3c6a5da7b6672503b6aa7e40501f3eb7..cce0a4bd0fdd2eca1a94660ffce2b4f90d8458c9 100644
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -872,7 +872,7 @@ LB_LINUX_TRY_COMPILE([
 
 #
 # LC_VFS_KERN_MOUNT
-# starting from 2.6.18 kernel don`t export do_kern_mount
+# starting from 2.6.18 kernel doesn't export do_kern_mount
 # and want to use vfs_kern_mount instead.
 #
 AC_DEFUN([LC_VFS_KERN_MOUNT],
@@ -941,7 +941,7 @@ EXTRA_KCFLAGS="$tmp_flags"
 ])
 
 # 2.6.19 API changes
-# inode don`t have i_blksize field
+# inode doesn't have i_blksize field
 AC_DEFUN([LC_INODE_BLKSIZE],
 [AC_MSG_CHECKING([inode has i_blksize field])
 LB_LINUX_TRY_COMPILE([
@@ -1023,7 +1023,7 @@ LB_LINUX_TRY_COMPILE([
 ])
 
 # LC_NR_PAGECACHE
-# 2.6.18 don`t export nr_pagecahe
+# 2.6.18 doesn't export nr_pagecahe
 AC_DEFUN([LC_NR_PAGECACHE],
 [AC_MSG_CHECKING([kernel export nr_pagecache])
 LB_LINUX_TRY_COMPILE([