diff --git a/src/main/scala/li/cil/oc/util/FluidUtils.scala b/src/main/scala/li/cil/oc/util/FluidUtils.scala
index 542dfe77d..2b50bf24e 100644
--- a/src/main/scala/li/cil/oc/util/FluidUtils.scala
+++ b/src/main/scala/li/cil/oc/util/FluidUtils.scala
@@ -174,7 +174,7 @@ object FluidUtils {
     def canFill(fluid: Fluid): Boolean = fluid.canBePlacedInWorld
 
     override def fill(resource: FluidStack, doFill: Boolean): Int = {
-      if (resource != null && resource.getFluid.canBePlacedInWorld && resource.getFluid.getBlock != null) {
+      if (resource != null && resource.getFluid.canBePlacedInWorld && resource.getFluid.getBlock != null && resource.amount >= 1000) {
         if (doFill) {
           val world = position.world.get
           if (!world.isAirBlock(position) && !world.containsAnyLiquid(position.bounds))