diff --git a/projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/AbstractComputerBlockEntity.java b/projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/AbstractComputerBlockEntity.java
index b5765e290..53b1ddb58 100644
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/AbstractComputerBlockEntity.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/AbstractComputerBlockEntity.java
@@ -109,7 +109,6 @@ public abstract class AbstractComputerBlockEntity extends BlockEntity implements
 
         computer.keepAlive();
 
-        fresh = false;
         computerID = computer.getID();
 
         // If the on state has changed, mark as dirty.
@@ -129,12 +128,15 @@ public abstract class AbstractComputerBlockEntity extends BlockEntity implements
         // Update the block state if needed.
         updateBlockState(computer.getState());
 
+        // Update redstone output if the computer is new or the computer's redstone output has changed.
         var changes = computer.pollRedstoneChanges();
-        if (changes != 0) {
+        if (fresh || changes != 0) {
             for (var direction : DirectionUtil.FACINGS) {
-                if ((changes & (1 << remapToLocalSide(direction).ordinal())) != 0) updateRedstoneTo(direction);
+                if (fresh || (changes & (1 << remapToLocalSide(direction).ordinal())) != 0) updateRedstoneTo(direction);
             }
         }
+
+        fresh = false;
     }
 
     protected abstract void updateBlockState(ComputerState newState);