diff --git a/src/Humanizer.Tests.Shared/StringHumanizeTests.cs b/src/Humanizer.Tests.Shared/StringHumanizeTests.cs
index 6b35eb0d5..e1cfe2177 100644
--- a/src/Humanizer.Tests.Shared/StringHumanizeTests.cs
+++ b/src/Humanizer.Tests.Shared/StringHumanizeTests.cs
@@ -74,6 +74,7 @@ public void CanHumanizeStringWithAcronyms(string input, string expectedValue)
         [InlineData("Title_humanization_Honors_ALLCAPS", "Title Humanization Honors ALLCAPS")]
         [InlineData("MühldorferStraße23", "Mühldorfer Straße 23")]
         [InlineData("mühldorfer_STRAẞE_23", "Mühldorfer STRAẞE 23")]
+        [InlineData("CAN RETURN TITLE CASE", "Can Return Title Case")]
         public void CanHumanizeIntoTitleCase(string input, string expectedResult)
         {
             Assert.Equal(expectedResult, input.Humanize(LetterCasing.Title));
diff --git a/src/Humanizer/StringHumanizeExtensions.cs b/src/Humanizer/StringHumanizeExtensions.cs
index c25a6a8cd..163eeef04 100644
--- a/src/Humanizer/StringHumanizeExtensions.cs
+++ b/src/Humanizer/StringHumanizeExtensions.cs
@@ -32,6 +32,12 @@ private static string FromPascalCase(string input)
                     ? match.Value
                     : match.Value.ToLower()));
 
+            if (result.Replace(" ", "").ToCharArray().All(c => char.IsUpper(c)) &&
+                result.Contains(" "))
+            {
+                result = result.ToLower();
+            }
+
             return result.Length > 0 ? char.ToUpper(result[0]) +
                 result.Substring(1, result.Length - 1) : result;
         }