diff --git a/build.xml b/build.xml
index d9e7b0d..6f78764 100644
--- a/build.xml
+++ b/build.xml
@@ -473,6 +473,7 @@
            excludes="**/templates/*"
            includeantruntime="false"
            debug="true"
+           encoding="utf-8"
            source="${jdk_version}"
            target="${jdk_version}"
            classpath="${jtb_tgt_cla_dir}"
@@ -493,6 +494,7 @@
            destdir="${jtb_tgt_cla_dir}"
            includeantruntime="false"
            debug="true"
+           encoding="utf-8"
            source="${jdk_version}"
            target="${jdk_version}"
            classpath="${jtb_tgt_cla_dir};${freemarker_jar}"
@@ -515,6 +517,7 @@
            destdir="${jtb_tgt_cla_dir}"
            includeantruntime="false"
            debug="true"
+           encoding="utf-8"
            source="${jdk_version}"
            target="${jdk_version}"
            classpath="${jtb_tgt_cla_dir};${freemarker_jar}"
@@ -536,6 +539,7 @@
            destdir="${jtb_tgt_cla_dir}"
            includeantruntime="false"
            debug="true"
+           encoding="utf-8"
            source="${jdk_version}"
            target="${jdk_version}"
            classpath="${jtb_tgt_cla_dir}"
@@ -557,6 +561,7 @@
            includes="**/signature/*"
            includeantruntime="false"
            debug="true"
+           encoding="utf-8"
            source="${jdk_version}"
            target="${jdk_version}"
            classpath="${jtb_tgt_cla_dir}"
@@ -589,6 +594,7 @@
                      **/JavaPrinter*,
                      **/AcceptInliner*, **/CommentsPrinter*, JavaCCPrinter*, **/JJFileAnnotator*"
            includeantruntime="false"
+           encoding="utf-8"
            source="${jdk_version}"
            target="${jdk_version}"
            listfiles="true"
@@ -607,6 +613,7 @@
            destdir="${jtb_tgt_cla_dir}"
            includes="**/visitor/*"
            includeantruntime="false"
+           encoding="utf-8"
            source="${jdk_version}"
            target="${jdk_version}"
            listfiles="true"