diff --git a/src/package.lisp b/src/package.lisp
index a1d9769..e396357 100644
--- a/src/package.lisp
+++ b/src/package.lisp
@@ -92,6 +92,8 @@
    tree-map-insert-map
    tree-map-insert-alist
    tree-map-insert-hash-table
+   ;; pairing heap
+   #:pairing-heap #:pairing-heap-find-min #:pairing-heap-merge #:pairing-heap-insert #:pairing-heap-remove-min
    ;; queues
    make-amortized-queue amortized-queue amortized-queue-empty-p
    amortized-enqueue amortized-dequeue amortized-queue-push