diff --git a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394.java b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394.java
index de9f72c486c..5f601f8b58e 100644
--- a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394.java
+++ b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394.java
@@ -29,6 +29,9 @@ public class OldSchool9394 extends Constructed {
         setCodes.add(mage.sets.Legends.getInstance().getCode());
         setCodes.add(mage.sets.TheDark.getInstance().getCode());
 
+        // unban chaos orb, we allow it (restricted) for the xmage-errated version in Old School Constructed.
+        banned.removeIf(name -> name.equals("Chaos Orb"));
+
         restricted.add("Ancestral Recall");
         restricted.add("Balance");
         restricted.add("Black Lotus");
diff --git a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394CFB.java b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394CFB.java
index 4a2d0cb1f07..5ade150a9eb 100644
--- a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394CFB.java
+++ b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394CFB.java
@@ -213,6 +213,9 @@ public class OldSchool9394CFB extends Constructed {
         banned.add("Wildfire Eternal");
         banned.add("Xathrid Necromancer");
 
+        // unban chaos orb, we allow it (restricted) for the xmage-errated version in Old School Constructed.
+        banned.removeIf(name -> name.equals("Chaos Orb"));
+
         restricted.add("Ancestral Recall");
         restricted.add("Balance");
         restricted.add("Black Lotus");
diff --git a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394EC.java b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394EC.java
index 73e70d2b912..b57ff1c15b8 100644
--- a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394EC.java
+++ b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394EC.java
@@ -213,6 +213,9 @@ public class OldSchool9394EC extends Constructed {
         banned.add("Wildfire Eternal");
         banned.add("Xathrid Necromancer");
 
+        // unban chaos orb, we allow it (restricted) for the xmage-errated version in Old School Constructed.
+        banned.removeIf(name -> name.equals("Chaos Orb"));
+
         restricted.add("Ancestral Recall");
         restricted.add("Balance");
         restricted.add("Black Lotus");
diff --git a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394EG.java b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394EG.java
index 753ef772b85..52bd4d2839d 100644
--- a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394EG.java
+++ b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394EG.java
@@ -31,6 +31,9 @@ public class OldSchool9394EG extends Constructed {
         setCodes.add(mage.sets.FallenEmpires.getInstance().getCode());
         setCodes.add(mage.sets.Chronicles.getInstance().getCode());
 
+        // unban chaos orb, we allow it (restricted) for the xmage-errated version in Old School Constructed.
+        banned.removeIf(name -> name.equals("Chaos Orb"));
+
         restricted.add("Ancestral Recall");
         restricted.add("Balance");
         restricted.add("Black Lotus");
diff --git a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394Italian.java b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394Italian.java
index c160a13cdf2..03cd95f871d 100644
--- a/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394Italian.java
+++ b/Mage.Server.Plugins/Mage.Deck.Constructed/src/mage/deck/OldSchool9394Italian.java
@@ -30,6 +30,9 @@ public class OldSchool9394Italian extends Constructed {
         setCodes.add(mage.sets.TheDark.getInstance().getCode());
         setCodes.add(mage.sets.RevisedEdition.getInstance().getCode());
 
+        // unban chaos orb, we allow it (restricted) for the xmage-errated version in Old School Constructed.
+        banned.removeIf(name -> name.equals("Chaos Orb"));
+
         restricted.add("Ancestral Recall");
         restricted.add("Balance");
         restricted.add("Black Lotus");