diff --git a/dialer/android/app/src/main/kotlin/com/icingDialer/KeystoreHelper.kt b/dialer/android/app/src/main/kotlin/com/icingDialer/KeystoreHelper.kt
index ae44f94..107aed7 100644
--- a/dialer/android/app/src/main/kotlin/com/icingDialer/KeystoreHelper.kt
+++ b/dialer/android/app/src/main/kotlin/com/icingDialer/KeystoreHelper.kt
@@ -73,7 +73,7 @@ class KeystoreHelper(private val call: MethodCall, private val result: MethodCha
         try {
             val keyStore = KeyStore.getInstance(ANDROID_KEYSTORE).apply { load(null) }
 
-            val privateKey = keyStore.getKey(alias, null) ?: run {
+            val privateKey = keyStore.getKey(alias, null) as? PrivateKey ?: run {
                 result.error("KEY_NOT_FOUND", "Private key not found for alias \"$alias\".", null)
                 return
             }