Index: /applications/editors/josm/plugins/build-common.xml
===================================================================
--- /applications/editors/josm/plugins/build-common.xml	(revision 33180)
+++ /applications/editors/josm/plugins/build-common.xml	(revision 33181)
@@ -84,4 +84,5 @@
             <compilerarg value="-Xep:ReferenceEquality:OFF" compiler="com.google.errorprone.ErrorProneAntCompilerAdapter"/>
             <compilerarg value="-Xep:InsecureCryptoUsage:OFF" compiler="com.google.errorprone.ErrorProneAntCompilerAdapter"/>
+            <compilerarg value="-Xep:FutureReturnValueIgnored:OFF" compiler="com.google.errorprone.ErrorProneAntCompilerAdapter"/>
             <compilerarg line="-Xmaxwarns 1000"/>
             <classpath refid="plugin.classpath"/>