diff --git a/aho-corasick-double-array-trie.spec b/aho-corasick-double-array-trie.spec
index 0a5c7a6..a6e1f76 100644
--- a/aho-corasick-double-array-trie.spec
+++ b/aho-corasick-double-array-trie.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package aho-corasick-double-array-trie
 #
-# Copyright (c) 2020 SUSE LLC
+# Copyright (c) 2022 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -44,7 +44,7 @@ cp %{SOURCE1} .
 %pom_remove_plugin :maven-source-plugin
 
 %build
-%{mvn_build} -f -- -Dsource=6
+%{mvn_build} -f -- -Dsource=6 -Dencoding=utf-8
 
 %install
 %mvn_install