diff --git a/src/main/java/li/cil/oc2/common/blockentity/ProjectorBlockEntity.java b/src/main/java/li/cil/oc2/common/blockentity/ProjectorBlockEntity.java
index d842fe24..20651190 100644
--- a/src/main/java/li/cil/oc2/common/blockentity/ProjectorBlockEntity.java
+++ b/src/main/java/li/cil/oc2/common/blockentity/ProjectorBlockEntity.java
@@ -167,7 +167,7 @@ public final class ProjectorBlockEntity extends ModBlockEntity implements Tickab
             updateProjectorState();
         }
 
-        if (!projectorDevice.hasChanges()) {
+        if (!projectorDevice.hasChanges() && !needsIDR) {
             return;
         }