diff --git a/okhttp/src/commonJvmAndroid/kotlin/okhttp3/internal/platform/Platform.kt b/okhttp/src/commonJvmAndroid/kotlin/okhttp3/internal/platform/Platform.kt
index f33d97972b94..9ccde5c61b0a 100644
--- a/okhttp/src/commonJvmAndroid/kotlin/okhttp3/internal/platform/Platform.kt
+++ b/okhttp/src/commonJvmAndroid/kotlin/okhttp3/internal/platform/Platform.kt
@@ -132,7 +132,7 @@ open class Platform {
   open fun getHandshakeServerNames(sslSocket: SSLSocket): List<String> {
     val session = sslSocket.session as? ExtendedSSLSession ?: return listOf()
     return try {
-      session.requestedServerNames.mapNotNull { (it as? SNIHostName)?.asciiName }
+      (session.requestedServerNames ?: emptyList()).mapNotNull { (it as? SNIHostName)?.asciiName }
     } catch (_: UnsupportedOperationException) {
       // UnsupportedOperationException – if the underlying provider does not implement the operation
       // https://github.com/bcgit/bc-java/issues/1773