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-rw-r--r--src/sp-filter.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/sp-filter.cpp b/src/sp-filter.cpp
index 0f9d47478..67fdd1ed9 100644
--- a/src/sp-filter.cpp
+++ b/src/sp-filter.cpp
@@ -59,6 +59,7 @@ static void
sp_filter_init(SPFilter *filter)
{
filter->cfilter = new CFilter(filter);
+ filter->typeHierarchy.insert(typeid(SPFilter));
delete filter->cobject;
filter->cobject = filter->cfilter;