diff --git a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_LargeTurbine_HPSteam.java b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_LargeTurbine_HPSteam.java
index fb399839..8447b748 100644
--- a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_LargeTurbine_HPSteam.java
+++ b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_LargeTurbine_HPSteam.java
@@ -103,9 +103,9 @@ public class GT_MetaTileEntity_LargeTurbine_HPSteam extends GT_MetaTileEntity_La
             float efficiency = 1.0f - Math.abs(((totalFlow - (float) aOptFlow) / aOptFlow));
             if(totalFlow>aOptFlow){efficiency = 1.0f;}
             tEU *= efficiency;
-            tEU = Math.max(1, tEU * (aBaseEff / 10000));
+            tEU = Math.max(1, (int)((long)tEU * (long)aBaseEff / 10000L));
         } else {
-            tEU = tEU * (aBaseEff / 10000);
+            tEU = (int)((long)tEU * (long)aBaseEff / 10000L);
         }
 
         return tEU;