diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index eeab972..adc20f8 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -2822,8 +2822,8 @@ mdb_txn_reset0(MDB_txn *txn, const char *act)
 		}
 
 		if (!txn->mt_parent) {
-			if (mdb_midl_shrink(&txn->mt_free_pgs))
-				env->me_free_pgs = txn->mt_free_pgs;
+			mdb_midl_shrink(&txn->mt_free_pgs);
+			env->me_free_pgs = txn->mt_free_pgs;
 			/* me_pgstate: */
 			env->me_pghead = NULL;
 			env->me_pglast = 0;
@@ -3409,8 +3409,8 @@ mdb_txn_commit(MDB_txn *txn)
 
 	mdb_midl_free(env->me_pghead);
 	env->me_pghead = NULL;
-	if (mdb_midl_shrink(&txn->mt_free_pgs))
-		env->me_free_pgs = txn->mt_free_pgs;
+	mdb_midl_shrink(&txn->mt_free_pgs);
+	env->me_free_pgs = txn->mt_free_pgs;
 
 #if (MDB_DEBUG) > 2
 	mdb_audit(txn);
diff --git a/libraries/liblmdb/midl.c b/libraries/liblmdb/midl.c
index 16782dc..57a9d49 100644
--- a/libraries/liblmdb/midl.c
+++ b/libraries/liblmdb/midl.c
@@ -116,7 +116,7 @@ void mdb_midl_free(MDB_IDL ids)
 		free(ids-1);
 }
 
-int mdb_midl_shrink( MDB_IDL *idp )
+void mdb_midl_shrink( MDB_IDL *idp )
 {
 	MDB_IDL ids = *idp;
 	if (*(--ids) > MDB_IDL_UM_MAX &&
@@ -124,9 +124,7 @@ int mdb_midl_shrink( MDB_IDL *idp )
 	{
 		*ids++ = MDB_IDL_UM_MAX;
 		*idp = ids;
-		return 1;
 	}
-	return 0;
 }
 
 static int mdb_midl_grow( MDB_IDL *idp, int num )
diff --git a/libraries/liblmdb/midl.h b/libraries/liblmdb/midl.h
index 9b041d7..2331e78 100644
--- a/libraries/liblmdb/midl.h
+++ b/libraries/liblmdb/midl.h
@@ -98,9 +98,8 @@ void mdb_midl_free(MDB_IDL ids);
 	/** Shrink an IDL.
 	 * Return the IDL to the default size if it has grown larger.
 	 * @param[in,out] idp	Address of the IDL to shrink.
-	 * @return	0 on no change, non-zero if shrunk.
 	 */
-int mdb_midl_shrink(MDB_IDL *idp);
+void mdb_midl_shrink(MDB_IDL *idp);
 
 	/** Make room for num additional elements in an IDL.
 	 * @param[in,out] idp	Address of the IDL.