diff --git a/CHANGELOG-PRERELEASE-jp.md b/CHANGELOG-PRERELEASE-jp.md
index 0613ccb7..d1079eb7 100644
--- a/CHANGELOG-PRERELEASE-jp.md
+++ b/CHANGELOG-PRERELEASE-jp.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - [#1508] テクスチャのサイズが4の倍数でない場合に、エクスプレッションメニューアイコンの自動圧縮が失敗する問題を修正
+- [#1513] iOSビルドでエクスプレッションメニューアイコンの圧縮が壊れる問題を修正
 
 ### Changed
 - [#1514] `Merge Blend Tree` は `Merge Motion (Blend Tree)` に改名され、アニメーションクリップにも対応するようになりました
diff --git a/CHANGELOG-PRERELEASE.md b/CHANGELOG-PRERELEASE.md
index 40f0e251..67136fd1 100644
--- a/CHANGELOG-PRERELEASE.md
+++ b/CHANGELOG-PRERELEASE.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - [#1508] Fix an issue where automatic compression of expressions menu icons would fail when the texture dimensions were
   not divisible by four.
+- [#1513] Expression menu icon compression broke on iOS builds
 
 ### Changed
 - [#1514] `Merge Blend Tree` is now `Merge Motion (Blend Tree)` and supports merging animation clips as well as blend trees
diff --git a/CHANGELOG-jp.md b/CHANGELOG-jp.md
index 50bb93d5..b4325071 100644
--- a/CHANGELOG-jp.md
+++ b/CHANGELOG-jp.md
@@ -23,6 +23,7 @@ Modular Avatarの主な変更点をこのファイルで記録しています。
 - [#1504] 一部の状況で内部の`DelayDisable`レイヤーが不要なオブジェクトを参照しないように変更
   - これにより、オブジェクトがアニメーションされているかどうかを追跡するAAOなどのツールとの互換性が向上します
 - [#1508] テクスチャのサイズが4の倍数でない場合に、エクスプレッションメニューアイコンの自動圧縮が失敗する問題を修正
+- [#1513] iOSビルドでエクスプレッションメニューアイコンの圧縮処理が壊れる問題を修正
 
 ### Changed
 - [#1514] `Merge Blend Tree` は `Merge Motion (Blend Tree)` に改名され、アニメーションクリップにも対応するようになりました
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8be6f65d..8798635b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - This helps improve compatibility with AAO and other tools that track whether objects are animated 
 - [#1508] Fix an issue where automatic compression of expressions menu icons would fail when the texture dimensions were
   not divisible by four.
+- [#1513] Expression menu icon compression broke on iOS builds
 
 ### Changed
 - [#1514] `Merge Blend Tree` is now `Merge Motion (Blend Tree)` and supports merging animation clips as well as blend trees
diff --git a/Editor/FixupPasses/FixupExpressionsMenuPass.cs b/Editor/FixupPasses/FixupExpressionsMenuPass.cs
index 48f42ef6..491db0c5 100644
--- a/Editor/FixupPasses/FixupExpressionsMenuPass.cs
+++ b/Editor/FixupPasses/FixupExpressionsMenuPass.cs
@@ -119,11 +119,20 @@ namespace nadena.dev.modular_avatar.core.editor
             }
         }
 
-#if UNITY_ANDROID
-        internal const TextureFormat TargetFormat = TextureFormat.ASTC_4x4;
-#else
-        internal const TextureFormat TargetFormat = TextureFormat.DXT5;
-#endif
+        internal static TextureFormat TargetFormat
+        {
+            get
+            {
+                switch (EditorUserBuildSettings.activeBuildTarget)
+                {
+                    case BuildTarget.StandaloneWindows64:
+                        return TextureFormat.DXT5;
+                    default:
+                        return TextureFormat.ASTC_4x4;
+                }
+            }
+        }
+        
 
         private static Texture2D MaybeScaleIcon(BuildContext context, Texture2D original)
         {