diff --git a/pkg/object/search.go b/pkg/object/search.go
index 6c596d6..2a835ba 100644
--- a/pkg/object/search.go
+++ b/pkg/object/search.go
@@ -72,7 +72,6 @@ const (
 	fKeyParent
 	fKeyPropRoot
 	fKeyPropPhy
-	fKeyPropChildfree
 )
 
 func (k filterKey) String() string {
@@ -103,8 +102,6 @@ func (k filterKey) String() string {
 		return v2object.FilterPropertyRoot
 	case fKeyPropPhy:
 		return v2object.FilterPropertyPhy
-	case fKeyPropChildfree:
-		return v2object.FilterPropertyChildfree
 	}
 }
 
@@ -227,18 +224,6 @@ func (f *SearchFilters) AddPhyFilter() {
 	f.addPhyFilter()
 }
 
-func (f *SearchFilters) addChildFreeFilter(val bool) {
-	f.addReservedFilter(MatchStringEqual, fKeyPropChildfree, boolStringer(val))
-}
-
-func (f *SearchFilters) AddChildfreeFilter() {
-	f.addChildFreeFilter(true)
-}
-
-func (f *SearchFilters) AddNonChildfreeFilter() {
-	f.addChildFreeFilter(false)
-}
-
 func (f *SearchFilters) AddParentIDFilter(m SearchMatchType, id *ID) {
 	f.addReservedFilter(m, fKeyParent, id)
 }
diff --git a/v2/object/filters.go b/v2/object/filters.go
index e0e750a..0777e96 100644
--- a/v2/object/filters.go
+++ b/v2/object/filters.go
@@ -41,9 +41,6 @@ const (
 
 	// FilterPropertyPhy is a filter key to check if an object physically stored on a node.
 	FilterPropertyPhy = ReservedFilterPrefix + "PHY"
-
-	// FilterPropertyChildfree is a filter key to check if an object has empty children list in `Split` header.
-	FilterPropertyChildfree = ReservedFilterPrefix + "CHILDFREE"
 )
 
 const (