diff --git a/OpenRA.Game/Map/MapCache.cs b/OpenRA.Game/Map/MapCache.cs
index 44bc4a9d9c..2bbf636958 100644
--- a/OpenRA.Game/Map/MapCache.cs
+++ b/OpenRA.Game/Map/MapCache.cs
@@ -175,11 +175,6 @@ namespace OpenRA
 						createdPreview = true;
 						bitmap = Minimap.RenderMapPreview(modData.DefaultRules.TileSets[p.Map.Tileset], p.Map, modData.DefaultRules, true);
 					}
-					else if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
-					{
-						Log.Write("debug", "Discarding invalid map preview for {0}", p.Uid);
-						continue;
-					}
 
 					// Note: this is not generally thread-safe, but it works here because:
 					//   (a) This worker is the only thread writing to this sheet
diff --git a/mods/ra/maps/allies-01/map.png b/mods/ra/maps/allies-01/map.png
index aaa1507d66..4db5929608 100644
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diff --git a/mods/ra/maps/allies-02/map.png b/mods/ra/maps/allies-02/map.png
index aaa1507d66..4db5929608 100644
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diff --git a/mods/ra/maps/allies-03a/map.png b/mods/ra/maps/allies-03a/map.png
index aaa1507d66..4db5929608 100644
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diff --git a/mods/ra/maps/allies-03b/map.png b/mods/ra/maps/allies-03b/map.png
index aaa1507d66..4db5929608 100644
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diff --git a/mods/ra/maps/allies-05a/map.png b/mods/ra/maps/allies-05a/map.png
index aaa1507d66..4db5929608 100644
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diff --git a/mods/ra/maps/intervention/map.png b/mods/ra/maps/intervention/map.png
index aaa1507d66..4db5929608 100644
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diff --git a/mods/ra/maps/monster-tank-madness/map.png b/mods/ra/maps/monster-tank-madness/map.png
index aaa1507d66..4db5929608 100644
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diff --git a/mods/ra/maps/survival01/map.png b/mods/ra/maps/survival01/map.png
index aaa1507d66..4db5929608 100644
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diff --git a/mods/ra/maps/survival02/map.png b/mods/ra/maps/survival02/map.png
index aaa1507d66..4db5929608 100644
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