diff --git a/src/util-bst-ldict.scm b/src/util-bst-ldict.scm
index 3a024cd..e1d69d8 100644
--- a/src/util-bst-ldict.scm
+++ b/src/util-bst-ldict.scm
@@ -25,14 +25,29 @@
 	 util-bst
 	 util-proc)
 
- (define (symbol<? a b)
-   (string<? (symbol->string a)
-	     (symbol->string b)))
+ (define (ldict<? a b)
+   (if (number? a)
+       (< a b)
+       (string<? (symbol->string a)
+		 (symbol->string b))))
 
- (define (make-ldict)
-   (make-bst 'symbol eq? symbol<?))
+ (define (make-ldict . equality?/pairs)
+   (let ((equality? (if (or (null? equality?/pairs)
+			    (not (procedure? (car equality?/pairs))))
+			eq?
+			(car equality?/pairs)))
+	 (pairs (if (or (null? equality?/pairs)
+			(procedure? (car equality?/pairs)))
+		    '()
+		    (car equality?/pairs))))
+     (let loop ((ld (make-bst 'ldict equality? ldict<?))
+		(pairs pairs))
+       (if (null? pairs)
+	   ld
+	   (loop (ldict-set ld (caar pairs) (cdar pairs))
+		 (cdr pairs))))))
 
- (define ldict? (bst? 'symbol))
+ (define ldict? (bst? 'ldict))
 
  (define ldict-empty? bst-empty?)
  (define ldict-contains? bst-contains?)