diff --git a/mypyc/namegen.py b/mypyc/namegen.py
index 675dae9001c7..ce84fde143d1 100644
--- a/mypyc/namegen.py
+++ b/mypyc/namegen.py
@@ -100,10 +100,9 @@ def make_module_translation_map(names: list[str]) -> dict[str, str]:
     for name in names:
         for suffix in candidate_suffixes(name):
             if num_instances[suffix] == 1:
-                result[name] = suffix
                 break
-        else:
-            assert False, names
+        # Takes the last suffix if none are unique
+        result[name] = suffix
     return result
 
 
diff --git a/mypyc/test/test_namegen.py b/mypyc/test/test_namegen.py
index 509018b4c3bd..f88edbd00dce 100644
--- a/mypyc/test/test_namegen.py
+++ b/mypyc/test/test_namegen.py
@@ -35,6 +35,12 @@ def test_make_module_translation_map(self) -> None:
             "fu.bar": "fu.bar.",
             "foo.baz": "baz.",
         }
+        assert make_module_translation_map(["foo", "foo.foo", "bar.foo", "bar.foo.bar.foo"]) == {
+            "foo": "foo.",
+            "foo.foo": "foo.foo.",
+            "bar.foo": "bar.foo.",
+            "bar.foo.bar.foo": "foo.bar.foo.",
+        }
 
     def test_name_generator(self) -> None:
         g = NameGenerator([["foo", "foo.zar"]])