diff --git a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_LargeChemicalReactor.java b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_LargeChemicalReactor.java
index c8f5a4aa..e268c3bf 100644
--- a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_LargeChemicalReactor.java
+++ b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_LargeChemicalReactor.java
@@ -132,6 +132,7 @@ public class GT_MetaTileEntity_LargeChemicalReactor extends GT_MetaTileEntity_Mu
 				this.mMaxProgresstime = maxProgresstime;
 				this.mOutputItems = recipe.mOutputs;
 				this.mOutputFluids = recipe.mFluidOutputs;
+				this.updateSlots();
 				return true;
 			}
 		}