diff --git a/sshlib/src/main/kotlin/org/connectbot/sshlib/crypto/X25519ProviderFactory.kt b/sshlib/src/main/kotlin/org/connectbot/sshlib/crypto/X25519ProviderFactory.kt
index ed0d7c4..c5cdf05 100644
--- a/sshlib/src/main/kotlin/org/connectbot/sshlib/crypto/X25519ProviderFactory.kt
+++ b/sshlib/src/main/kotlin/org/connectbot/sshlib/crypto/X25519ProviderFactory.kt
@@ -40,6 +40,7 @@ internal object X25519ProviderFactory {
 
     private fun isPlatformNativeAvailable(): Boolean = try {
         KeyPairGenerator.getInstance("X25519")
+        Class.forName("java.security.spec.XECPrivateKeySpec")
         true
     } catch (_: Exception) {
         false