Index: plugins/opendata/build.xml
===================================================================
--- plugins/opendata/build.xml	(revision 29691)
+++ plugins/opendata/build.xml	(working copy)
@@ -80,7 +80,7 @@
     -->
     <target name="compile" depends="init, compile_lang3, compile_poi, compile_jopendoc, compile_neptune, compile_j7zip">
         <echo message="compiling sources for  ${plugin.jar} ... "/>
-        <javac srcdir="src" debug="true" destdir="${plugin.build.dir}" includeAntRuntime="false">
+        <javac srcdir="src" debug="true" destdir="${plugin.build.dir}" includeAntRuntime="false" encoding="UTF-8">
             <classpath>
         	    <pathelement path="${plugin.build.dir}"/>
                 <pathelement location="${josm}"/>
Index: plugins/build-common.xml
===================================================================
--- plugins/build-common.xml	(revision 29691)
+++ plugins/build-common.xml	(working copy)
@@ -37,7 +37,7 @@
     -->
     <target name="compile" depends="init">
         <echo message="compiling sources for ${plugin.jar} ..."/>
-        <javac srcdir="src" debug="true" destdir="${plugin.build.dir}" includeantruntime="false">
+        <javac srcdir="src" debug="true" destdir="${plugin.build.dir}" includeantruntime="false" encoding="UTF-8">
             <compilerarg value="-Xlint:deprecation"/>
             <compilerarg value="-Xlint:unchecked"/>
             <classpath>
Index: plugins/videomapping/build.xml
===================================================================
--- plugins/videomapping/build.xml	(revision 29691)
+++ plugins/videomapping/build.xml	(working copy)
@@ -63,7 +63,7 @@
     -->
     <target name="compile" depends="init">
         <echo message="compiling sources for ${plugin.jar} ..."/>
-        <javac srcdir="src" classpathref="classpath" debug="true" destdir="${plugin.build.dir}">
+        <javac srcdir="src" classpathref="classpath" debug="true" destdir="${plugin.build.dir}" encoding="UTF-8">
             <compilerarg value="-Xlint:deprecation"/>
             <compilerarg value="-Xlint:unchecked"/>
         </javac>