diff --git a/libraries/libmdb/Makefile b/libraries/libmdb/Makefile
index 3948905..16cec0d 100644
--- a/libraries/libmdb/Makefile
+++ b/libraries/libmdb/Makefile
@@ -14,22 +14,22 @@ test:	all
 	mkdir testdb
 	./mtest && ./mdb_stat testdb
 
-libmdb.a:	mdb.o idl.o
-	ar rs $@ mdb.o idl.o
+libmdb.a:	mdb.o midl.o
+	ar rs $@ mdb.o midl.o
 
-libmdb.so:	mdb.o idl.o
-	gcc -shared -o $@ mdb.o idl.o
+libmdb.so:	mdb.o midl.o
+	gcc -shared -o $@ mdb.o midl.o
 
 mdb_stat: mdb_stat.o libmdb.a
 mtest:    mtest.o    libmdb.a
 mtest2:	mtest2.o libmdb.a
 mtest3:	mtest3.o libmdb.a
 
-mdb.o: mdb.c mdb.h idl.h
+mdb.o: mdb.c mdb.h midl.h
 	$(CC) $(CFLAGS) -fPIC $(CPPFLAGS) -c mdb.c
 
-idl.o: idl.c idl.h
-	$(CC) $(CFLAGS) -fPIC $(CPPFLAGS) -c idl.c
+midl.o: midl.c midl.h
+	$(CC) $(CFLAGS) -fPIC $(CPPFLAGS) -c midl.c
 
 %:	%.o
 	$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index 489bbde..b601d5d 100644
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -54,7 +54,7 @@
 #define ULONG		unsigned long
 typedef ULONG		pgno_t;
 
-#include "idl.h"
+#include "midl.h"
 
 #ifndef DEBUG
 #define DEBUG 1
@@ -580,7 +580,7 @@ mdb_touch(MDB_txn *txn, MDB_pageparent *pp)
 		if ((dp = mdb_alloc_page(txn, pp->mp_parent, pp->mp_pi, 1)) == NULL)
 			return ENOMEM;
 		DPRINTF("touched page %lu -> %lu", mp->mp_pgno, dp->p.mp_pgno);
-		mdb_idl_insert(txn->mt_free_pgs, mp->mp_pgno);
+		mdb_midl_insert(txn->mt_free_pgs, mp->mp_pgno);
 		pgno = dp->p.mp_pgno;
 		memcpy(&dp->p, mp, txn->mt_env->me_psize);
 		mp = &dp->p;
@@ -2682,7 +2682,7 @@ mdb_del0(MDB_txn *txn, MDB_dbi dbi, unsigned int ki, MDB_pageparent *mpp, MDB_no
 		ovpages = OVPAGES(NODEDSZ(leaf), txn->mt_env->me_psize);
 		for (i=0; i<ovpages; i++) {
 			DPRINTF("freed ov page %lu", pg);
-			mdb_idl_insert(txn->mt_free_pgs, pg);
+			mdb_midl_insert(txn->mt_free_pgs, pg);
 			pg++;
 		}
 	}
@@ -2764,7 +2764,7 @@ mdb_del(MDB_txn *txn, MDB_dbi dbi,
 					while (parent != NULL) {
 						for (i=0; i<NUMKEYS(top->mp_page); i++) {
 							ni = NODEPTR(top->mp_page, i);
-							mdb_idl_insert(txn->mt_free_pgs, ni->mn_pgno);
+							mdb_midl_insert(txn->mt_free_pgs, ni->mn_pgno);
 						}
 						if (parent) {
 							parent->mp_ki++;
@@ -2779,7 +2779,7 @@ mdb_del(MDB_txn *txn, MDB_dbi dbi,
 						}
 					}
 				}
-				mdb_idl_insert(txn->mt_free_pgs, mx.mx_txn.mt_dbs[mx.mx_cursor.mc_dbi].md_root);
+				mdb_midl_insert(txn->mt_free_pgs, mx.mx_txn.mt_dbs[mx.mx_cursor.mc_dbi].md_root);
 			}
 		}
 	}
diff --git a/libraries/libmdb/idl.c b/libraries/libmdb/midl.c
similarity index 93%
rename from libraries/libmdb/idl.c
rename to libraries/libmdb/midl.c
index 7fc39c0..8b39aca 100644
--- a/libraries/libmdb/idl.c
+++ b/libraries/libmdb/midl.c
@@ -17,14 +17,14 @@
 #include <string.h>
 #include <sys/types.h>
 #include <assert.h>
-#include "idl.h"
+#include "midl.h"
 
 typedef unsigned long pgno_t;
 
 /* Sort the IDLs from highest to lowest */
 #define IDL_CMP(x,y)	 ( x > y ? -1 : ( x < y ? 1 : 0 ) )
 
-unsigned mdb_idl_search( ID *ids, ID id )
+unsigned mdb_midl_search( ID *ids, ID id )
 {
 	/*
 	 * binary search of id in ids
@@ -60,7 +60,7 @@ unsigned mdb_idl_search( ID *ids, ID id )
 	}
 }
 
-int mdb_idl_insert( ID *ids, ID id )
+int mdb_midl_insert( ID *ids, ID id )
 {
 	unsigned x;
 
@@ -75,7 +75,7 @@ int mdb_idl_insert( ID *ids, ID id )
 		return 0;
 	}
 
-	x = mdb_idl_search( ids, id );
+	x = mdb_midl_search( ids, id );
 	assert( x > 0 );
 
 	if( x < 1 ) {
diff --git a/libraries/libmdb/idl.h b/libraries/libmdb/midl.h
similarity index 95%
rename from libraries/libmdb/idl.h
rename to libraries/libmdb/midl.h
index 1a51df4..aeb0af6 100644
--- a/libraries/libmdb/idl.h
+++ b/libraries/libmdb/midl.h
@@ -14,8 +14,8 @@
  * <http://www.OpenLDAP.org/license.html>.
  */
 
-#ifndef _MDB_IDL_H_
-#define _MDB_IDL_H_
+#ifndef _MDB_MIDL_H_
+#define _MDB_MIDL_H_
 
 #define AC_MEMCPY(dst,src,size)	memcpy(dst,src,size)
 
@@ -73,6 +73,6 @@
 #define MDB_IDL_N( ids )		( MDB_IDL_IS_RANGE(ids) \
 	? (ids[2]-ids[1])+1 : ids[0] )
 
-int mdb_idl_insert( ID *ids, ID id );
+int mdb_midl_insert( ID *ids, ID id );
 
-#endif
+#endif	/* _MDB_MIDL_H_ */