--- old/make/windows/makefiles/wb.make	2012-03-21 11:03:01.000000000 +0100
+++ new/make/windows/makefiles/wb.make	2012-03-21 11:03:01.000000000 +0100
@@ -40,7 +40,7 @@
 
 
 {$(WorkSpace)\src\share\tools\whitebox\sun\hotspot}.java.class::
-	$(COMPILE_JAVAC) -d $(WB_CLASSES) $<
+	$(COMPILE_JAVAC) -sourcepath $(WBSRCDIR) -d $(WB_CLASSES) $<
 
 $(WB_JAR): wb_java_srcs
 	$(RUN_JAR) cf $@ -C $(WB_CLASSES) .