diff --git a/rich/segment.py b/rich/segment.py
index aa2394cae..86c8c9a9c 100644
--- a/rich/segment.py
+++ b/rich/segment.py
@@ -129,7 +129,7 @@ def _split_cells(cls, segment: "Segment", cut: int) -> Tuple["Segment", "Segment
 
         cell_size = get_character_cell_size
 
-        pos = int((cut / cell_length) * (len(text) - 1)) - 1
+        pos = int((cut / cell_length) * (len(text))) - 1
         if pos < 0:
             pos = 0