diff --git a/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GT_MTE_LargeTurbine_SHSteam.java b/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GT_MTE_LargeTurbine_SHSteam.java
index 18c6e303b..763854ec9 100644
--- a/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GT_MTE_LargeTurbine_SHSteam.java
+++ b/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GT_MTE_LargeTurbine_SHSteam.java
@@ -112,7 +112,7 @@ int fluidIntoPower(ArrayList<FluidStack> aFluids, long aOptFlow, int aBaseEff, f
         if (totalFlow <= 0) return 0;
         tEU = totalFlow;
         addOutput(GT_ModHandler.getSteam(totalFlow));
-        if (totalFlow != aOptFlow) {
+        if (totalFlow != realOptFlow) {
             float efficiency = 1.0f - Math.abs((totalFlow - (float) realOptFlow) / (float) realOptFlow);
             // if(totalFlow>aOptFlow){efficiency = 1.0f;}
             tEU *= efficiency;
diff --git a/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GT_MTE_LargeTurbine_Steam.java b/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GT_MTE_LargeTurbine_Steam.java
index e4fb92b1e..f257e1508 100644
--- a/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GT_MTE_LargeTurbine_Steam.java
+++ b/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GT_MTE_LargeTurbine_Steam.java
@@ -123,7 +123,7 @@ int fluidIntoPower(ArrayList<FluidStack> aFluids, long aOptFlow, int aBaseEff, f
         tEU = totalFlow;
         int waterToOutput = useWater(totalFlow / 160.0f);
         addOutput(GT_ModHandler.getDistilledWater(waterToOutput));
-        if (totalFlow != aOptFlow) {
+        if (totalFlow != realOptFlow) {
             float efficiency = 1.0f - Math.abs((totalFlow - (float) realOptFlow) / (float) realOptFlow);
             // if(totalFlow>aOptFlow){efficiency = 1.0f;}
             tEU *= efficiency;