diff --git a/HISTORY.rst b/HISTORY.rst
index f450a8f..d8594d1 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -1,6 +1,12 @@
 History
 =======
 
+2.6.2 (2023-02-23)
+------------------
+
+* Fix package name normalization for names with delimiters (``urltemplate`` != ``url-template``).
+
+
 2.6.1 (2022-11-23)
 ------------------
 
diff --git a/pipcompilemulti/deduplicate.py b/pipcompilemulti/deduplicate.py
index 98e13b1..58c2a44 100644
--- a/pipcompilemulti/deduplicate.py
+++ b/pipcompilemulti/deduplicate.py
@@ -62,5 +62,5 @@ def __contains__(self, key):
     @classmethod
     def _make_stem(cls, name):
         for delim in cls._DELIMITERS:
-            name = name.replace(delim, '')
+            name = name.replace(delim, '-')
         return name.lower()
diff --git a/tests/test_deduplicate.py b/tests/test_deduplicate.py
index 12bbf2f..4b38aae 100644
--- a/tests/test_deduplicate.py
+++ b/tests/test_deduplicate.py
@@ -12,4 +12,6 @@ def test_package_deduplicator_handles_delimiters_normalization():
     package_deduplicator.register_packages_for_env('b', {'pkg.name': '1.0'})
     ignored_packages = package_deduplicator.ignored_packages('a')
     assert 'pkg-name' in ignored_packages
+    assert 'pkg.name' in ignored_packages
+    assert 'pkgname' not in ignored_packages
     assert ignored_packages['Pkg_Name'] == '1.0'