1 files changed, 3 insertions, 1 deletions
diff --git a/src/main/java/gregtech/api/metatileentity/implementations/GT_MetaTileEntity_MultiBlockBase.java b/src/main/java/gregtech/api/metatileentity/implementations/GT_MetaTileEntity_MultiBlockBase.java
index 0f5f5dcc85..7d37b6747f 100644
--- a/src/main/java/gregtech/api/metatileentity/implementations/GT_MetaTileEntity_MultiBlockBase.java
+++ b/src/main/java/gregtech/api/metatileentity/implementations/GT_MetaTileEntity_MultiBlockBase.java
@@ -375,7 +375,9 @@ public abstract class GT_MetaTileEntity_MultiBlockBase extends MetaTileEntity
             boolean active = aBaseMetaTileEntity.isActive() && mPollution > 0;
             setMufflers(active);
         } else {
-            doActivitySound(getActivitySoundLoop());
+            if (!aBaseMetaTileEntity.hasMufflerUpgrade()) {
+                doActivitySound(getActivitySoundLoop());
+            }
         }
     }