diff --git a/units.ini b/units.ini
index 0078c01ace..e73f5e55c8 100755
--- a/units.ini
+++ b/units.ini
@@ -368,7 +368,7 @@ Traits=Building, RenderBuilding, AcceptsOre, StoresOre
 Dimensions=3,3
 Footprint=_x_ xxx x==
 SelectionPriority=3
-OrePips=18
+OrePips=17
 LongDesc=Converts Ore and Gems into money
 [SILO]
 Description=Silo