diff --git a/flesh/demon/demon_head.arc b/flesh/demon/demon_head.arc
index 82f84d7e9..9953ebf1b 100644
--- a/flesh/demon/demon_head.arc
+++ b/flesh/demon/demon_head.arc
@@ -3,6 +3,7 @@ name head
 face demon_head.111
 material 32
 type 72
+nrof 1
 weight 25
 editable 2048
 value 400
diff --git a/inorganic/mercury.arc b/inorganic/mercury.arc
index 85dd7d915..49b769b7b 100644
--- a/inorganic/mercury.arc
+++ b/inorganic/mercury.arc
@@ -4,6 +4,7 @@ material 2
 value 210
 immune 72
 type 73
+nrof 1
 weight 3000
 identified 1
 editable 2048
@@ -22,6 +23,7 @@ material 2
 value 4000
 immune 72
 type 73
+nrof 1
 weight 8000
 editable 2048
 magicmap grey
diff --git a/inorganic/true_lead.arc b/inorganic/true_lead.arc
index 478d727fe..30dd33e31 100644
--- a/inorganic/true_lead.arc
+++ b/inorganic/true_lead.arc
@@ -6,6 +6,7 @@ material 2
 value 13000
 immune 68
 type 73
+nrof 1
 weight 5000
 editable 2048
 magicmap grey
diff --git a/spell/power_crystal.arc b/spell/power_crystal.arc
index c944f6f4f..491bb48a5 100644
--- a/spell/power_crystal.arc
+++ b/spell/power_crystal.arc
@@ -9,6 +9,7 @@ power_crystal.113
 power_crystal.114
 mina
 type 156
+weight 3
 color_fg white
 value 10000000
 material 64