diff --git a/writerfilter/inc/writerfilter.mk b/writerfilter/inc/writerfilter.mk
index 0b0c5cae6292..b53e58ca977b 100644
--- a/writerfilter/inc/writerfilter.mk
+++ b/writerfilter/inc/writerfilter.mk
@@ -28,7 +28,8 @@
 CDEFS+=-DWRITERFILTER_DLLIMPLEMENTATION
 .IF "$(DBG_LEVEL)">="2"
 CDEFS+=-DDEBUG_DOMAINMAPPER -DDEBUG_ELEMENT -DDEBUG_RESOLVE \
-       -DDEBUG_CONTEXT_STACK -DDEBUG_ATTRIBUTES -DDEBUG_PROPERTIES
+       -DDEBUG_CONTEXT_STACK -DDEBUG_ATTRIBUTES -DDEBUG_PROPERTIES \
+       -DDEBUG_CONTEXT_HANDLER -DDEBUG_IMPORT
 CFLAGS += $(LIBXML_CFLAGS)
 .ENDIF
 .IF "$(SYSTEM_LIBXML)" == "YES"