diff --git a/src/Humanizer.Tests.Shared/InflectorTests.cs b/src/Humanizer.Tests.Shared/InflectorTests.cs
index d751d95a6..35a7d7d95 100644
--- a/src/Humanizer.Tests.Shared/InflectorTests.cs
+++ b/src/Humanizer.Tests.Shared/InflectorTests.cs
@@ -372,6 +372,13 @@ public IEnumerator<object[]> GetEnumerator()
             yield return new object[] { "ex", "exes" };
             yield return new object[] { "", "" };
 
+            //Issue #1100
+            yield return new object[] { "doe", "does" };
+            yield return new object[] { "hoe", "hoes" };
+            yield return new object[] { "toe", "toes" };
+            yield return new object[] { "woe", "woes" };
+            yield return new object[] { "potato", "potatoes" };
+
             //Issue 1132
             yield return new object[] { "metadata", "metadata" };
         }
diff --git a/src/Humanizer/Inflections/Vocabularies.cs b/src/Humanizer/Inflections/Vocabularies.cs
index 1038937d5..2e156eca3 100644
--- a/src/Humanizer/Inflections/Vocabularies.cs
+++ b/src/Humanizer/Inflections/Vocabularies.cs
@@ -60,7 +60,7 @@ private static Vocabulary BuildDefault()
             _default.AddSingular("(m)ovies$", "$1ovie");
             _default.AddSingular("(x|ch|ss|sh)es$", "$1");
             _default.AddSingular("(^[m|l])ice$", "$1ouse");
-            _default.AddSingular("(o)es$", "$1");
+            _default.AddSingular("(?<!^[a-z])(o)es$", "$1");
             _default.AddSingular("(shoe)s$", "$1");
             _default.AddSingular("(cris|ax|test)es$", "$1is");
             _default.AddSingular("(octop|vir|alumn|fung|cact|foc|hippopotam|radi|stimul|syllab|nucle)i$", "$1us");