diff --git a/src/kernel/item.c b/src/kernel/item.c
index e6380f400..e9473ff10 100644
--- a/src/kernel/item.c
+++ b/src/kernel/item.c
@@ -66,36 +66,34 @@ potion_type *potiontypes;
 static int res_changeaura(unit * u, const resource_type * rtype, int delta)
 {
   assert(rtype != NULL);
-  change_spellpoints(u, delta);
-  return 0;
+  return change_spellpoints(u, delta);
 }
 
 static int res_changeperson(unit * u, const resource_type * rtype, int delta)
 {
   assert(rtype != NULL || !"not implemented");
   scale_number(u, u->number + delta);
-  return 0;
+  return u->number;
 }
 
 static int res_changepermaura(unit * u, const resource_type * rtype, int delta)
 {
   assert(rtype != NULL);
-  change_maxspellpoints(u, delta);
-  return 0;
+  return change_maxspellpoints(u, delta);
 }
 
 static int res_changehp(unit * u, const resource_type * rtype, int delta)
 {
   assert(rtype != NULL);
   u->hp += delta;
-  return 0;
+  return u->hp;
 }
 
 static int res_changepeasants(unit * u, const resource_type * rtype, int delta)
 {
   assert(rtype != NULL && u->region->land);
   u->region->land->peasants += delta;
-  return 0;
+  return u->region->land->peasants;
 }
 
 int res_changeitem(unit * u, const resource_type * rtype, int delta)
diff --git a/src/kernel/pool.c b/src/kernel/pool.c
index 3fc207b5d..997bb3b30 100644
--- a/src/kernel/pool.c
+++ b/src/kernel/pool.c
@@ -79,6 +79,7 @@ int change_resource(unit * u, const resource_type * rtype, int change)
     i = change_maxspellpoints(u, change);
   else
     assert(!"undefined resource detected. rtype->uchange not initialized.");
+  assert(i==get_resource(u, rtype));
   assert(i >= 0);
   if (i >= 100000000) {
     log_warning("%s has %d %s\n", unitname(u), i, rtype->_name[0]);