diff --git a/forge-game/src/main/java/forge/game/GameFormat.java b/forge-game/src/main/java/forge/game/GameFormat.java
index 28e0fe3ba2d..84821c57913 100644
--- a/forge-game/src/main/java/forge/game/GameFormat.java
+++ b/forge-game/src/main/java/forge/game/GameFormat.java
@@ -280,6 +280,11 @@ public class GameFormat implements Comparable<GameFormat> {
             }
             return result;
         }
+
+        @Override
+        public void add(GameFormat item) {
+            naturallyOrdered.add(item);
+        }
     }
 
     public final Predicate<CardEdition> editionLegalPredicate = new Predicate<CardEdition>() {
diff --git a/forge-gui/src/main/java/forge/model/FModel.java b/forge-gui/src/main/java/forge/model/FModel.java
index fc37861ff0a..b6ea6ab34bc 100644
--- a/forge-gui/src/main/java/forge/model/FModel.java
+++ b/forge-gui/src/main/java/forge/model/FModel.java
@@ -93,6 +93,8 @@ public final class FModel {
     private static IStorage<QuestWorld> worlds;
     private static GameFormat.Collection formats;
 
+    private static GameFormat.Collection customFormats;
+
     public static void initialize(final IProgressBar progressBar, Function<ForgePreferences, Void> adjustPrefs) {
         ImageKeys.initializeDirs(
                 ForgeConstants.CACHE_CARD_PICS_DIR, ForgeConstants.CACHE_CARD_PICS_SUBDIR,
@@ -162,6 +164,12 @@ public final class FModel {
         ForgePreferences.UPLOAD_DRAFT = ForgePreferences.NET_CONN;
 
         formats = new GameFormat.Collection(new GameFormat.Reader(new File(ForgeConstants.BLOCK_DATA_DIR + "formats.txt")));
+        //add user custom formats if file present
+        customFormats = new GameFormat.Collection(new GameFormat.Reader(new File(ForgeConstants.USER_PREFS_DIR + "customformats.txt")));
+        for (GameFormat format:customFormats){
+            formats.add(format);
+        }
+
         blocks = new StorageBase<>("Block definitions", new CardBlock.Reader(ForgeConstants.BLOCK_DATA_DIR + "blocks.txt", magicDb.getEditions()));
         questPreferences = new QuestPreferences();
         conquestPreferences = new ConquestPreferences();