diff --git a/quantulum3/_lang/en_US/speak.py b/quantulum3/_lang/en_US/speak.py
index de40fca..68236c7 100644
--- a/quantulum3/_lang/en_US/speak.py
+++ b/quantulum3/_lang/en_US/speak.py
@@ -37,6 +37,10 @@ def unit_to_spoken(unit, count=1):
         # derived unit
         denominator_dimensions = [i for i in unit.dimensions if i["power"] > 0]
         denominator_string = parser.name_from_dimensions(denominator_dimensions, lang)
-        plural_denominator_string = load.pluralize(denominator_string)
+        if denominator_string:
+            plural_denominator_string = load.pluralize(denominator_string)
+        else:
+            # in case the denominator is empty, its plural is, too
+            plural_denominator_string = denominator_string
         unit_string = unit.name.replace(denominator_string, plural_denominator_string)
     return unit_string
diff --git a/quantulum3/tests/test_hypothesis.py b/quantulum3/tests/test_hypothesis.py
index 5cc0f66..c7d25b4 100644
--- a/quantulum3/tests/test_hypothesis.py
+++ b/quantulum3/tests/test_hypothesis.py
@@ -6,7 +6,7 @@
 
 import unittest
 
-from hypothesis import given, settings
+from hypothesis import example, given, settings
 from hypothesis import strategies as st
 
 from .. import parser as p
@@ -30,6 +30,7 @@ def test_extract_spellout_values(self, s, lang):
         p.extract_spellout_values(s, lang=lang)
 
     @given(st.text(), multilang_strategy)
+    @example("0/B", "en_US")
     @settings(deadline=None)
     def test_inline_parse_and_expand(self, s, lang):
         # Just assert that this does not throw any exceptions