diff --git a/src/hgvs/assemblymapper.py b/src/hgvs/assemblymapper.py
index dcc5e0a6..64766bb3 100644
--- a/src/hgvs/assemblymapper.py
+++ b/src/hgvs/assemblymapper.py
@@ -88,8 +88,11 @@ def __init__(
         self.in_par_assume = in_par_assume
         self._norm = None
         if self.normalize:
+            vm = VariantMapper(hdp=hdp, replace_reference=replace_reference, 
+                               prevalidation_level=prevalidation_level, 
+                               add_gene_symbol=add_gene_symbol)
             self._norm = hgvs.normalizer.Normalizer(
-                hdp, alt_aln_method=alt_aln_method, validate=False
+                hdp, alt_aln_method=alt_aln_method, validate=False, variantmapper=vm
             )
         self._assembly_map = {
             k: v for k, v in hdp.get_assembly_map(self.assembly_name).items() if k.startswith("NC_")