diff --git a/build.gradle b/build.gradle
index 5b9e723382020fceffe93de8afb56bcd0782a18f..cdf1ba96aebcbf16bdbfe2df8292990fd7a43b58 100644
--- a/build.gradle
+++ b/build.gradle
@@ -48,6 +48,7 @@ jastadd {
 }
 
 sourceCompatibility = targetCompatibility = '1.7'
+compileJava.options.encoding = 'UTF-8'
 
 repositories {
   mavenLocal()