diff --git a/OpenRA.FileFormats/Mod.cs b/OpenRA.FileFormats/Mod.cs
index e2d0ea39f6..361de84ac2 100644
--- a/OpenRA.FileFormats/Mod.cs
+++ b/OpenRA.FileFormats/Mod.cs
@@ -47,5 +47,12 @@ namespace OpenRA.FileFormats
 			}
 			return ret;
 		}
+
+		public string[] WithPrerequisites()
+		{
+			return Id.Iterate(m => AllMods[m].Requires)
+				.TakeWhile(m => m != null)
+				.ToArray();
+		}
 	}
 }
diff --git a/OpenRA.Mods.Cnc/Widgets/Logic/CncModBrowserLogic.cs b/OpenRA.Mods.Cnc/Widgets/Logic/CncModBrowserLogic.cs
index 90b143780f..8d760031a0 100644
--- a/OpenRA.Mods.Cnc/Widgets/Logic/CncModBrowserLogic.cs
+++ b/OpenRA.Mods.Cnc/Widgets/Logic/CncModBrowserLogic.cs
@@ -50,13 +50,8 @@ namespace OpenRA.Mods.Cnc.Widgets.Logic
 		
 		void LoadMod(string mod, Action onSwitch)
 		{
-			var mods = new List<string>();
-			while (!string.IsNullOrEmpty(mod))
-			{
-				mods.Add(mod);
-				mod = Mod.AllMods[mod].Requires;
-			}
-			
+			var mods = Mod.AllMods[mod].WithPrerequisites();
+
 			Game.RunAfterTick(() => 
 			{
 				Widget.CloseWindow();
diff --git a/OpenRA.Mods.RA/Widgets/Logic/MainMenuButtonsLogic.cs b/OpenRA.Mods.RA/Widgets/Logic/MainMenuButtonsLogic.cs
index f0ebffafc8..0219820141 100644
--- a/OpenRA.Mods.RA/Widgets/Logic/MainMenuButtonsLogic.cs
+++ b/OpenRA.Mods.RA/Widgets/Logic/MainMenuButtonsLogic.cs
@@ -46,12 +46,7 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 		
 		static void LoadMod(string mod)
 		{
-			var mods = new List<string>();
-			while (!string.IsNullOrEmpty(mod))
-			{
-				mods.Add(mod);
-				mod = Mod.AllMods[mod].Requires;
-			}
+			var mods = Mod.AllMods[mod].WithPrerequisites();
 
 			if (Game.CurrentMods.Keys.ToArray().SymmetricDifference(mods.ToArray()).Any()) 
 				Game.RunAfterTick(() => Game.InitializeWithMods(mods.ToArray()));