diff --git a/src/main/java/mod/emt/harkenscythe/client/sound/HSSoundAltar.java b/src/main/java/mod/emt/harkenscythe/client/sound/HSSoundAltar.java
index bf7eb4d..485de76 100644
--- a/src/main/java/mod/emt/harkenscythe/client/sound/HSSoundAltar.java
+++ b/src/main/java/mod/emt/harkenscythe/client/sound/HSSoundAltar.java
@@ -31,7 +31,7 @@ public HSSoundAltar(HSTileEntityAltar altar, float volume)
     @Override
     public void update()
     {
-        if (this.altar.bookSpread < 0.5F)
+        if (this.altar.isInvalid() || this.altar.bookSpread < 0.5F)
         {
             this.volume = this.volume - 0.05F;
         }