diff --git a/plugins/trezor/plugin.py b/plugins/trezor/plugin.py
index 50cb75c68..6de6d8f31 100644
--- a/plugins/trezor/plugin.py
+++ b/plugins/trezor/plugin.py
@@ -32,6 +32,7 @@ class TrezorCompatibleWallet(BIP44_HW_Wallet):
         return EncodeBase58Check(xpub)
 
     def decrypt_message(self, pubkey, message, password):
+        raise RuntimeError(_('Electrum and %s encryption and decryption are currently incompatible') % self.device)
         address = public_key_to_bc_address(pubkey.decode('hex'))
         client = self.get_client()
         address_path = self.address_id(address)