diff --git a/music21/common/enums.py b/music21/common/enums.py
index 5ef9efb6d..f23347ffc 100644
--- a/music21/common/enums.py
+++ b/music21/common/enums.py
@@ -157,9 +157,9 @@ class OffsetSpecial(StrEnum):
 
     * New in v7.
     '''
-    AT_END: str = 'highestTime'
-    LOWEST_OFFSET: str = 'lowestOffset'
-    HIGHEST_OFFSET: str = 'highestOffset'
+    AT_END = 'highestTime'
+    LOWEST_OFFSET = 'lowestOffset'
+    HIGHEST_OFFSET = 'highestOffset'
 
 
 class GatherSpanners(BooleanEnum):
diff --git a/music21/romanText/translate.py b/music21/romanText/translate.py
index 6539a2896..9bb2379a0 100644
--- a/music21/romanText/translate.py
+++ b/music21/romanText/translate.py
@@ -838,7 +838,12 @@ def translateSingleMeasureAtom(
             m.coreInsert(self.currentOffsetInMeasure, rtt)
             # environLocal.warn(f' Got an unknown token: {a}')
 
-    def processRTChord(self, a: rtObjects.RTChord, m: stream.Measure, currentOffset: OffsetQL) -> None:
+    def processRTChord(
+        self,
+        a: rtObjects.RTChord,
+        m: stream.Measure,
+        currentOffset: OffsetQL
+    ) -> None:
         '''
         Process a single RTChord atom.
         '''
@@ -894,7 +899,7 @@ def processRTChord(self, a: rtObjects.RTChord, m: stream.Measure, currentOffset:
                 rn.followsKeyChange = False
         except roman.RomanNumeralException:  # pragma: no cover
             # environLocal.printDebug(f' cannot create RN from: {a.src}')
-            rn = note.Note()  # create placeholder
+            rn = roman.RomanNumeral()  # create placeholder
 
         if self.pivotChordPossible is False:
             # probably best to find duration