diff --git a/pungi/phases/createrepo.py b/pungi/phases/createrepo.py
index 397c6a08..61821d92 100644
--- a/pungi/phases/createrepo.py
+++ b/pungi/phases/createrepo.py
@@ -196,7 +196,7 @@ def create_variant_repo(compose, arch, variant, pkg_type, modules_metadata=None)
         for module_id, mmd in variant.arch_mmds[arch].items():
             # Create copy of architecture specific mmd to filter out packages
             # which are not part of this particular repo.
-            repo_mmd = Modulemd.Module.new_from_string(mmd.dumps())
+            repo_mmd = mmd.copy()
             repo_mmd.set_arch(tree_arch_to_yum_arch(arch))
             artifacts = repo_mmd.get_rpm_artifacts()
 
diff --git a/pungi/phases/gather/sources/source_module.py b/pungi/phases/gather/sources/source_module.py
index 89e87bed..99d41303 100644
--- a/pungi/phases/gather/sources/source_module.py
+++ b/pungi/phases/gather/sources/source_module.py
@@ -59,7 +59,7 @@ class GatherSourceModule(pungi.phases.gather.source.GatherSourceBase):
         for mmd in variant.mmds:
             mmd_id = "%s-%s" % (mmd.get_name(), mmd.get_stream())
             if mmd_id not in variant.arch_mmds[arch]:
-                arch_mmd = Modulemd.Module.new_from_string(mmd.dumps())
+                arch_mmd = mmd.copy()
                 variant.arch_mmds[arch][mmd_id] = arch_mmd
 
         # Contains per-module RPMs added to variant.