diff --git a/machines/fluid_generator.lua b/machines/fluid_generator.lua
index d98cfaf..d68032a 100644
--- a/machines/fluid_generator.lua
+++ b/machines/fluid_generator.lua
@@ -94,6 +94,7 @@ local function takeFuelFromItem(self,pos)
 			inv:set_stack("src",1,fluidSlot)
 			meta:set_string("fluid",fuel.name)
 			meta:set_float("fluidAmount",fluidAmount+1000)
+			self:updateFormspec(pos)
 			return true
 		end
 	end