diff --git a/dtool/src/dtoolbase/typeHandle.cxx b/dtool/src/dtoolbase/typeHandle.cxx
index 6b7ee5aaf7..4cde03258e 100644
--- a/dtool/src/dtoolbase/typeHandle.cxx
+++ b/dtool/src/dtoolbase/typeHandle.cxx
@@ -166,25 +166,6 @@ get_python_type() const {
 }
 #endif
 
-/**
- * Return the Index of the BEst fit Classs from a set
- */
-int TypeHandle::
-get_best_parent_from_Set(const std::set< int > &legal_vals) const {
-  if (legal_vals.find(_index) != legal_vals.end()) {
-    return _index;
-  }
-
-  for (int pi = 0; pi < get_num_parent_classes(); ++pi) {
-    TypeHandle ph = get_parent_class(pi);
-    int val = ph.get_best_parent_from_Set(legal_vals);
-    if (val > 0) {
-      return val;
-    }
-  }
-  return -1;
-}
-
 std::ostream &
 operator << (std::ostream &out, TypeHandle::MemoryClass mem_class) {
   switch (mem_class) {
diff --git a/dtool/src/dtoolbase/typeHandle.h b/dtool/src/dtoolbase/typeHandle.h
index 10997ef67d..ba03589fe0 100644
--- a/dtool/src/dtoolbase/typeHandle.h
+++ b/dtool/src/dtoolbase/typeHandle.h
@@ -123,8 +123,6 @@ PUBLISHED:
   INLINE TypeHandle get_parent_towards(TypeHandle ancestor,
                                        TypedObject *object = nullptr) const;
 
-  int get_best_parent_from_Set(const std::set< int > &legal_vals) const;
-
   size_t get_memory_usage(MemoryClass memory_class) const;
   void inc_memory_usage(MemoryClass memory_class, size_t size);
   void dec_memory_usage(MemoryClass memory_class, size_t size);
diff --git a/dtool/src/dtoolbase/typeRegistry.cxx b/dtool/src/dtoolbase/typeRegistry.cxx
index 0633f5b984..2b731abf39 100644
--- a/dtool/src/dtoolbase/typeRegistry.cxx
+++ b/dtool/src/dtoolbase/typeRegistry.cxx
@@ -695,21 +695,3 @@ look_up_invalid(TypeHandle handle, TypedObject *object) const {
 
   return _handle_registry[handle._index];
 }
-
-/**
-
- */
-extern "C" int
-get_best_parent_from_Set(int id, const std::set<int> &this_set) {
-  // most common case..
-  if (this_set.find(id) != this_set.end()) {
-    return id;
-  }
-
-  TypeHandle th = TypeRegistry::ptr()->find_type_by_id(id);
-  if (th == TypeHandle::none()) {
-    return -1;
-  }
-
-  return th.get_best_parent_from_Set(this_set);
-}
diff --git a/dtool/src/dtoolbase/typeRegistry.h b/dtool/src/dtoolbase/typeRegistry.h
index 0051ba68a4..c5dafef6a5 100644
--- a/dtool/src/dtoolbase/typeRegistry.h
+++ b/dtool/src/dtoolbase/typeRegistry.h
@@ -118,9 +118,6 @@ private:
   friend class TypeHandle;
 };
 
-// Helper function to allow for "C" interaction into the type system
-extern "C" EXPCL_DTOOL_DTOOLBASE  int get_best_parent_from_Set(int id, const std::set<int> &this_set);
-
 #include "typeHandle.h"
 
 #include "typeRegistry.I"
diff --git a/dtool/src/dtoolbase/typedObject.I b/dtool/src/dtoolbase/typedObject.I
index 37bb183781..1c4f81067b 100644
--- a/dtool/src/dtoolbase/typedObject.I
+++ b/dtool/src/dtoolbase/typedObject.I
@@ -43,14 +43,6 @@ is_exact_type(TypeHandle handle) const {
   return get_type() == handle;
 }
 
-/**
- *
- */
-INLINE int TypedObject::
-get_best_parent_from_Set(const std::set<int> &inset) const {
-  return get_type().get_best_parent_from_Set(inset);
-}
-
 /**
  * Returns the object, upcast (if necessary) to a TypedObject pointer.
  */
diff --git a/dtool/src/dtoolbase/typedObject.h b/dtool/src/dtoolbase/typedObject.h
index dd60515f16..3bc9c15e41 100644
--- a/dtool/src/dtoolbase/typedObject.h
+++ b/dtool/src/dtoolbase/typedObject.h
@@ -106,8 +106,6 @@ PUBLISHED:
   INLINE bool is_exact_type(TypeHandle handle) const;
 
 public:
-  INLINE int get_best_parent_from_Set(const std::set<int> &) const;
-
   // Derived classes should override this function to call init_type().  It
   // will only be called in error situations when the type was for some reason
   // not properly initialized.