diff --git a/build.gradle.kts b/build.gradle.kts
index eb35dc7..1902d7d 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -36,6 +36,7 @@ java {
 
 neoForge {
 	version = loaderVersion
+	validateAccessTransformers = true
 
 	mods {
 		register(modId) {
diff --git a/src/main/java/icu/puqns67/skintypefix/util/Utils.java b/src/main/java/icu/puqns67/skintypefix/util/Utils.java
index 3c7b6e3..858a6d2 100644
--- a/src/main/java/icu/puqns67/skintypefix/util/Utils.java
+++ b/src/main/java/icu/puqns67/skintypefix/util/Utils.java
@@ -28,9 +28,8 @@ public class Utils {
 		var timesForSlim = new HashMap<Integer, Integer>();
 		PlayerSkin.Model result = null;
 
-		// The result of NativeImage.getPixelRGBA() is ARGB, not RGBA, like 0xAARRGGBB
-		PLAYER_SKIN_DIFF_SLIM_TO_WILD.forEach(p -> timesForDiff.merge(image.getPixelRGBA(p.x(), p.y()), 1, Integer::sum));
-		PLAYER_SKIN_SLIM.forEach(p -> timesForSlim.merge(image.getPixelRGBA(p.x(), p.y()), 1, Integer::sum));
+		PLAYER_SKIN_DIFF_SLIM_TO_WILD.forEach(p -> timesForDiff.merge(image.getPixelABGR(p.x(), p.y()), 1, Integer::sum));
+		PLAYER_SKIN_SLIM.forEach(p -> timesForSlim.merge(image.getPixelABGR(p.x(), p.y()), 1, Integer::sum));
 
 		var blackTimesForDiff = timesForDiff.getOrDefault(0xff000000, 0);
 		var blackTimesForSlim = timesForSlim.getOrDefault(0xff000000, 0);
diff --git a/src/main/resources/META-INF/accesstransformer.cfg b/src/main/resources/META-INF/accesstransformer.cfg
new file mode 100644
index 0000000..d75c08c
--- /dev/null
+++ b/src/main/resources/META-INF/accesstransformer.cfg
@@ -0,0 +1 @@
+public com.mojang.blaze3d.platform.NativeImage getPixelABGR(II)I
diff --git a/src/main/resources/META-INF/neoforge.mods.toml b/src/main/resources/META-INF/neoforge.mods.toml
index 9d50017..9d240ce 100644
--- a/src/main/resources/META-INF/neoforge.mods.toml
+++ b/src/main/resources/META-INF/neoforge.mods.toml
@@ -12,6 +12,9 @@ logoFile="assets/${mod_id}/logo.png"
 authors="${mod_authors}"
 description='''${mod_description}'''
 
+[[accessTransformers]]
+file="META-INF/accesstransformer.cfg"
+
 [[mixins]]
 config="${mod_id}.mixins.json"