diff --git a/packages/react-native-avoid-softinput/android/build.gradle b/packages/react-native-avoid-softinput/android/build.gradle
index 47ee197..9cf108c 100644
--- a/packages/react-native-avoid-softinput/android/build.gradle
+++ b/packages/react-native-avoid-softinput/android/build.gradle
@@ -20,7 +20,13 @@ if (project == rootProject) {
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+// AGP 9 ships built-in Kotlin support and registers the `kotlin` extension
+// itself. Applying the Kotlin plugin on top of it fails configuration with
+// "Cannot add extension with name 'kotlin'". Only apply it when nothing has
+// registered that extension yet.
+if (project.extensions.findByName('kotlin') == null) {
+  apply plugin: 'kotlin-android'
+}
 
 def safeAppExtGet(prop, fallback) {
   def appProject = rootProject.allprojects.find { it.plugins.hasPlugin('com.android.application') }