Index: trunk/build.xml
===================================================================
--- trunk/build.xml	(revision 7019)
+++ trunk/build.xml	(revision 7021)
@@ -206,4 +206,5 @@
         <javac srcdir="src" excludes="com/**,oauth/**,org/apache/commons/codec/**,org/openstreetmap/gui/jmapviewer/Demo.java" 
         	destdir="build" target="1.7" source="1.7" debug="on" includeantruntime="false" encoding="UTF-8">
+            <compilerarg value="-Xlint:cast"/>
             <compilerarg value="-Xlint:deprecation"/>
             <compilerarg value="-Xlint:unchecked"/>