diff --git a/src/alchemy.c b/src/alchemy.c
index b51437967..4b7e961a6 100644
--- a/src/alchemy.c
+++ b/src/alchemy.c
@@ -155,17 +155,6 @@ static int potion_luck(unit *u, region *r, attrib_type *atype, int amount) {
     return amount;
 }
 
-static int potion_power(unit *u, int amount) {
-    int hp = 10 * amount;
-
-    if (hp > u->number) {
-        hp = u->number;
-        amount = (hp + 9) % 10;
-    }
-    u->hp += hp * unit_max_hp(u) * 4;
-    return amount;
-}
-
 int use_potion(unit * u, const item_type * itype, int amount, struct order *ord)
 {
     region *r = u->region;
@@ -176,9 +165,6 @@ int use_potion(unit * u, const item_type * itype, int amount, struct order *ord)
     else if (itype == oldpotiontype[P_HORSE]) {
         amount = potion_luck(u, r, &at_horseluck, amount);
     }
-    else if (itype == oldpotiontype[P_MACHT]) {
-        amount = potion_power(u, amount);
-    }
     else {
         change_effect(u, itype, 10 * amount);
     }
diff --git a/src/items.c b/src/items.c
index 6f1981a08..41617c0d0 100644
--- a/src/items.c
+++ b/src/items.c
@@ -458,6 +458,25 @@ static int use_ointment(unit *u, const item_type *itype,
     return potion_ointment(u, amount);
 }
 
+static int potion_power(unit *u, int amount) {
+    int hp = 10 * amount;
+
+    if (hp > u->number) {
+        hp = u->number;
+        amount = (hp + 9) % 10;
+    }
+    u->hp += hp * unit_max_hp(u) * 4;
+    return amount;
+}
+
+static int use_power_elixir(unit *u, const item_type *itype,
+    int amount, struct order *ord)
+{
+    ADDMSG(&u->faction->msgs, msg_message("use_item",
+        "unit amount item", u, amount, itype->rtype));
+    return potion_power(u, amount);
+}
+
 void register_itemfunctions(void)
 {
     /* have tests: */
@@ -474,5 +493,6 @@ void register_itemfunctions(void)
     register_item_use(use_bloodpotion, "use_peasantblood");
     register_item_use(use_ointment, "use_ointment");
     register_item_use(use_healing_potion, "use_p14");
+    register_item_use(use_power_elixir, "use_p13");
     register_item_use(use_warmthpotion, "use_nestwarmth");
 }