diff -urN libreoffice-4.2.0.1.old/solenv/gbuild/JavaClassSet.mk libreoffice-4.2.0.1/solenv/gbuild/JavaClassSet.mk
--- libreoffice-4.2.0.1.old/solenv/gbuild/JavaClassSet.mk	2014-01-01 13:44:24.824887549 +0000
+++ libreoffice-4.2.0.1/solenv/gbuild/JavaClassSet.mk	2014-01-01 13:47:08.727872354 +0000
@@ -40,6 +40,8 @@
 		$(if $(3),$(gb_JavaClassSet_JAVACCOMMAND) \
 			$(gb_JavaClassSet_JAVACDEBUG) \
 			$(gb_JavaClassSet_XBOOTCLASSPATH) \
+			-source $(JAVA_SOURCE_VER) \
+			-target $(JAVA_TARGET_VER) \
 			-Xbootclasspath/p:$(XBOOT_CP_P) \
 			-classpath "$(T_CP)$(gb_CLASSPATHSEP)$(call gb_JavaClassSet_get_classdir,$(2))" \
 			-d $(call gb_JavaClassSet_get_classdir,$(2)) \