diff --git a/docs/old/mempool.rst b/docs/old/mempool.rst
index 34dd433..85bf112 100644
--- a/docs/old/mempool.rst
+++ b/docs/old/mempool.rst
@@ -126,7 +126,9 @@ instance, we might as well try to reuse the memory for the
 ``scratch_space`` field, as well.  To do this, you provide initialization and
 finalization callbacks:
 
-.. function:: void cork_mempool_set_callbacks(struct cork_mempool \*mp, void \*user_data, cork_free_f free_user_data, cork_init_f init_object, cork_done_f done_object)
+.. function:: void cork_mempool_set_user_data(struct cork_mempool \*mp, void \*user_data, cork_free_f free_user_data)
+              void cork_mempool_set_init_object(struct cork_mempool \*mp, cork_init_f init_object)
+              void cork_mempool_set_done_object(struct cork_mempool \*mp, cork_done_f done_object)
 
    Provide callback functions that will be used to initialize and finalize each
    object created by the memory pool.
@@ -152,7 +154,8 @@ logic goes into ``done_object``, and not our destructor::
 
     static cork_mempool  *pool;
     pool = cork_mempool_new(pool, struct my_data);
-    cork_mempool_set_callbacks(pool, NULL, NULL, my_data_init, my_data_done);
+    cork_mempool_set_init_object(pool, my_data_init);
+    cork_mempool_set_done_object(pool, my_data_done);
 
     struct my_data *
     my_data_new(void)
diff --git a/include/libcork/core/mempool.h b/include/libcork/core/mempool.h
index e762bef..aaf745d 100644
--- a/include/libcork/core/mempool.h
+++ b/include/libcork/core/mempool.h
@@ -41,6 +41,18 @@ CORK_API void
 cork_mempool_free(struct cork_mempool *mp);
 
 
+CORK_API void
+cork_mempool_set_user_data(struct cork_mempool *mp,
+                           void *user_data, cork_free_f free_user_data);
+
+CORK_API void
+cork_mempool_set_init_object(struct cork_mempool *mp, cork_init_f init_object);
+
+CORK_API void
+cork_mempool_set_done_object(struct cork_mempool *mp, cork_done_f done_object);
+
+/* Deprecated; you should now use separate calls to cork_mempool_set_user_data,
+ * cork_mempool_set_init_object, and cork_mempool_set_done_object. */
 CORK_API void
 cork_mempool_set_callbacks(struct cork_mempool *mp,
                            void *user_data, cork_free_f free_user_data,
diff --git a/src/libcork/core/mempool.c b/src/libcork/core/mempool.c
index 9600839..ad00371 100644
--- a/src/libcork/core/mempool.c
+++ b/src/libcork/core/mempool.c
@@ -108,18 +108,37 @@ cork_mempool_free(struct cork_mempool *mp)
 
 
 void
-cork_mempool_set_callbacks(struct cork_mempool *mp,
-                           void *user_data, cork_free_f free_user_data,
-                           cork_init_f init_object,
-                           cork_done_f done_object)
+cork_mempool_set_user_data(struct cork_mempool *mp,
+                           void *user_data, cork_free_f free_user_data)
 {
     cork_free_user_data(mp);
     mp->user_data = user_data;
     mp->free_user_data = free_user_data;
+}
+
+void
+cork_mempool_set_init_object(struct cork_mempool *mp, cork_init_f init_object)
+{
     mp->init_object = init_object;
+}
+
+void
+cork_mempool_set_done_object(struct cork_mempool *mp, cork_done_f done_object)
+{
     mp->done_object = done_object;
 }
 
+void
+cork_mempool_set_callbacks(struct cork_mempool *mp,
+                           void *user_data, cork_free_f free_user_data,
+                           cork_init_f init_object,
+                           cork_done_f done_object)
+{
+    cork_mempool_set_user_data(mp, user_data, free_user_data);
+    cork_mempool_set_init_object(mp, init_object);
+    cork_mempool_set_done_object(mp, done_object);
+}
+
 
 /* If this function succeeds, then we guarantee that there will be at
  * least one object in mp->free_list. */
diff --git a/tests/test-mempool.c b/tests/test-mempool.c
index 134fb6e..9b5842c 100644
--- a/tests/test-mempool.c
+++ b/tests/test-mempool.c
@@ -100,8 +100,9 @@ START_TEST(test_mempool_reuse_01)
     size_t  done_call_count = 0;
     struct cork_mempool  *mp;
     mp = cork_mempool_new_ex(int64_t, BLOCK_SIZE);
-    cork_mempool_set_callbacks
-        (mp, &done_call_count, NULL, int64_init, int64_done);
+    cork_mempool_set_user_data(mp, &done_call_count, NULL);
+    cork_mempool_set_init_object(mp, int64_init);
+    cork_mempool_set_done_object(mp, int64_done);
 
     int64_t  *obj;
     fail_if((obj = cork_mempool_new_object(mp)) == NULL,