diff --git a/pdftext/pdf/pages.py b/pdftext/pdf/pages.py
index c478df1..fe08917 100644
--- a/pdftext/pdf/pages.py
+++ b/pdftext/pdf/pages.py
@@ -116,7 +116,7 @@ def span_break():
         if all([
             char["bbox"][1] < (span["bbox"][1] - span["bbox"].height * line_distance_threshold), # char top is above span
             char["bbox"][3] < (span["bbox"].height * superscript_height_threshold) + span["bbox"][1], # char bottom is not full line height
-            char["bbox"][0] > span["bbox"][2], # char is to the right of the span
+            char["bbox"][2] > span["bbox"][2], # char is to the right of the span
         ]):
             span_break()
             continue