1 files changed, 15 insertions, 0 deletions
diff --git a/crawl-ref/source/ouch.cc b/crawl-ref/source/ouch.cc
index 8a06b6357e..96f806bbfc 100644
--- a/crawl-ref/source/ouch.cc
+++ b/crawl-ref/source/ouch.cc
@@ -456,6 +456,21 @@ static bool _expose_invent_to_element(beam_type flavour, int strength)
                 continue;
             }
 
+            // These stack with conservation; they're supposed to be good.
+            if (target_class == OBJ_SCROLLS
+                    && you.mutation[MUT_CONSERVE_SCROLLS]
+                    && !one_chance_in(10))
+            {
+                continue;
+            }
+
+            if (target_class == OBJ_POTIONS
+                    && you.mutation[MUT_CONSERVE_POTIONS]
+                    && !one_chance_in(10))
+            {
+                continue;
+            }
+
             // Loop through all items in the stack.
             for (int j = 0; j < you.inv[i].quantity; ++j)
             {