diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index f27879b63..b3de5bb0f 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.19 -
 ====================================
+  Standardise protective include file #defines.
   Add regex functions to library.
   Avoid trailing separator in reports when there are hidden sort fields.
   Fix segfault in 'dmsetup status' without --showkeys against crypt target.
diff --git a/libdm/datastruct/bitset.h b/libdm/datastruct/bitset.h
index 939e4932b..bb7924ecd 100644
--- a/libdm/datastruct/bitset.h
+++ b/libdm/datastruct/bitset.h
@@ -13,8 +13,8 @@
  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#ifndef _LVM_BITSET_H
-#define _LVM_BITSET_H
+#ifndef _DM_BITSET_H
+#define _DM_BITSET_H
 
 #include "pool.h"
 
diff --git a/libdm/datastruct/hash.h b/libdm/datastruct/hash.h
index 0f745e532..13b7c8627 100644
--- a/libdm/datastruct/hash.h
+++ b/libdm/datastruct/hash.h
@@ -13,8 +13,8 @@
  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#ifndef _LVM_HASH_H
-#define _LVM_HASH_H
+#ifndef _DM_HASH_H
+#define _DM_HASH_H
 
 struct hash_table;
 struct hash_node;
diff --git a/libdm/mm/dbg_malloc.h b/libdm/mm/dbg_malloc.h
index a6553074a..2399725b1 100644
--- a/libdm/mm/dbg_malloc.h
+++ b/libdm/mm/dbg_malloc.h
@@ -13,8 +13,8 @@
  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#ifndef _LVM_DBG_MALLOC_H
-#define _LVM_DBG_MALLOC_H
+#ifndef _DM_DBG_MALLOC_H
+#define _DM_DBG_MALLOC_H
 
 #include <stdlib.h>
 #include <string.h>
diff --git a/libdm/mm/pool.h b/libdm/mm/pool.h
index 01700460a..505f0a6b7 100644
--- a/libdm/mm/pool.h
+++ b/libdm/mm/pool.h
@@ -13,8 +13,8 @@
  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#ifndef _LVM_POOL_H
-#define _LVM_POOL_H
+#ifndef _DM_POOL_H
+#define _DM_POOL_H
 
 #include <string.h>
 #include <stdlib.h>