diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 0632f81e..6934cc50 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -18,7 +18,12 @@ android {
     namespace = libs.versions.packageName.get()
     defaultConfig {
         applicationId = "cn.ba7opf.look4sat"
-        ndk { abiFilters.add("armeabi-v7a") }
+        // CW decoder ships for both ABIs (see feature/cw jniLibs); the APK must
+        // not be pinned to 32-bit only or 64-bit devices fall back to ARM32.
+        ndk {
+            abiFilters.add("armeabi-v7a")
+            abiFilters.add("arm64-v8a")
+        }
     }
     signingConfigs {
         create("release") {
diff --git a/feature/cw/build.gradle.kts b/feature/cw/build.gradle.kts
index 3a781ca9..96505fe4 100644
--- a/feature/cw/build.gradle.kts
+++ b/feature/cw/build.gradle.kts
@@ -10,10 +10,11 @@ android {
     compileOptions {
         encoding = "UTF-8"
     }
-    // 照搬 Morse Expert 1.15: native 解码器仅 armeabi-v7a
+    // Morse Expert 1.15 官方 Play 分包提供 ARM32/ARM64 原生解码器
+    // (jniLibs/armeabi-v7a + arm64-v8a), 两个 ABI 都打进 APK
     defaultConfig {
         ndk {
-            abiFilters += listOf("armeabi-v7a")
+            abiFilters += listOf("armeabi-v7a", "arm64-v8a")
         }
     }
 }
diff --git a/feature/cw/src/main/jniLibs/arm64-v8a/libnativedecoderjni.so b/feature/cw/src/main/jniLibs/arm64-v8a/libnativedecoderjni.so
new file mode 100644
index 00000000..6beac670
Binary files /dev/null and b/feature/cw/src/main/jniLibs/arm64-v8a/libnativedecoderjni.so differ