--- solenv/gbuild/JavaClassSet.mk.old	2012-03-29 18:44:35.000000000 +0200
+++ solenv/gbuild/JavaClassSet.mk	2012-03-30 19:21:42.000000000 +0200
@@ -44,6 +44,8 @@ $(call gb_Helper_abbreviate_dirs_native,
 	$(if $(3),$(gb_JavaClassSet_JAVACCOMMAND) \
 		$(gb_JavaClassSet_JAVACDEBUG) \
 		$(gb_JavaClassSet_XBOOTCLASSPATH) \
+		-source $(JAVA_SOURCE_VER) \
+		-target $(JAVA_TARGET_VER) \
 		-Xbootclasspath/p:$(XBOOT_CP_P) \
 		-cp "$(T_CP)$(gb_CLASSPATHSEP)$(call gb_JavaClassSet_get_classdir,$(2))" \
 		-d $(call gb_JavaClassSet_get_classdir,$(2)) \