diff --git a/dev-python/aiocoap/Manifest b/dev-python/aiocoap/Manifest
index 1977898a6..b3be77610 100644
--- a/dev-python/aiocoap/Manifest
+++ b/dev-python/aiocoap/Manifest
@@ -1,3 +1,4 @@
+AUX aiocoap-0.4a1-no-umlaut.patch 264 BLAKE2B 4c1ba684d5d60ee324a572f04a6345d098b4b32334610eea53085bddcc081d4564cbee1fbb15462ff84d53c5a49757cc13ed2122f85dd87718a613864dabe2bc SHA512 6334856a9538a5e748353fcf1accb174241a5c4846ead94e9b77ec5617dc3718f4e56e10e834d218182e2c65e70bebfb402a756595156836da7323420bbd9437
 DIST aiocoap-0.4_alpha3.tar.gz 123988 BLAKE2B 62879a9c52033c7e467f2d130bb2837063fa0c809bea83d0e74e0d2c0a8d253ae9b9e76fc72a36a3e4ec39524aa08855b1425bb7370aaa77465ae51e1692fc94 SHA512 2d7539da4f688d9a60900937be36c464be2133298cd738154984dfee8f095e0919de339179a783c59e65736b1bdef65135d610090edf8fd49eef1b7f11d9cc15
-EBUILD aiocoap-0.4_alpha3.ebuild 665 BLAKE2B dd10802c28d4d9b915f8ca3884700e26402e8a105d239ea5b98d3e909de7a35c7fd8ec5a0bf7b3ba12446038ffee2c0d4b7eeec4e9ada505da509b1f42178a51 SHA512 daad8d450bdfd263127a64c76ab204daabfb3f6c32886d9ce4591f06d8ac36355a0b5b320bb87d1db7860e48e6baed9ee7808e1d5db854ea67985197cb2964cf
+EBUILD aiocoap-0.4_alpha3.ebuild 722 BLAKE2B 16b5fa2d35606f003f225d2c9ac253f0dd7fe213b770e685636a18e14f6197d9559256909ffcf2821888145e86edfd75f25aee12f0738b58c4a5b833f842aea9 SHA512 bb63918a98b8f9100c92bc5628845567d9324acc011f7ebb4eaf53574a663f9be975ae52135263f582629026a68c9c06fba27a7e2757b2d507534679fada68a2
 MISC metadata.xml 252 BLAKE2B 507e0ddc9d50b879ff374b903b142f85d020dfd6c486aba2af84fe082c878e780edbb79188ae10104d57db0eb775c86814cc8c06891a3854c9da840a4d377050 SHA512 9470ac9c8a5a4f80e3f767e7aa198addc7b21866c63b2a310e9f41ce65817672fb77423117bdd619e99cb62322025aeadf50717e23eafabf99080fcc106820af
diff --git a/dev-python/aiocoap/aiocoap-0.4_alpha3.ebuild b/dev-python/aiocoap/aiocoap-0.4_alpha3.ebuild
index cfb1c241c..87fb66c2c 100644
--- a/dev-python/aiocoap/aiocoap-0.4_alpha3.ebuild
+++ b/dev-python/aiocoap/aiocoap-0.4_alpha3.ebuild
@@ -32,6 +32,6 @@ S="${WORKDIR}/${PN}-${MY_PV}"
 
 src_prepare() {
 	      rm -rf tests  # FIXME
-
+	      eapply "${FILESDIR}/aiocoap-0.4a1-no-umlaut.patch"
 	      eapply_user
 	      }
diff --git a/dev-python/aiocoap/files/aiocoap-0.4a1-no-umlaut.patch b/dev-python/aiocoap/files/aiocoap-0.4a1-no-umlaut.patch
new file mode 100644
index 000000000..bb806e854
--- /dev/null
+++ b/dev-python/aiocoap/files/aiocoap-0.4a1-no-umlaut.patch
@@ -0,0 +1,9 @@
+diff -Naru a/setup.py b/setup.py
+--- a/setup.py	2017-11-10 13:58:37.000000000 +0100
++++ b/setup.py	2019-01-10 11:17:51.297349676 +0100
+@@ -1,4 +1,5 @@
+ #!/usr/bin/env python3
++# -*- coding: utf-8 -*-
+
+ # This file is part of the Python aiocoap library project.
+ #