diff --git a/package/python-magic-wormhole-mailbox-server/Config.in b/package/python-magic-wormhole-mailbox-server/Config.in
index db20d3e7b6..a0721e866f 100644
--- a/package/python-magic-wormhole-mailbox-server/Config.in
+++ b/package/python-magic-wormhole-mailbox-server/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_PYTHON_MAGIC_WORMHOLE_MAILBOX_SERVER
 	bool "python-magic-wormhole-mailbox-server"
+	depends on BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS # python-autobahn -> python-cryptography
 	select BR2_PACKAGE_PYTHON3_SQLITE # runtime
 	select BR2_PACKAGE_PYTHON_ATTRS # runtime
 	select BR2_PACKAGE_PYTHON_AUTOBAHN # runtime