diff --git a/src/pyj/read_book/flow_mode.pyj b/src/pyj/read_book/flow_mode.pyj
index f6e16d1b74..8f4b4d15c9 100644
--- a/src/pyj/read_book/flow_mode.pyj
+++ b/src/pyj/read_book/flow_mode.pyj
@@ -628,7 +628,10 @@ def ensure_selection_visible():
 
 def ensure_selection_boundary_visible(use_end):
     sel = window.getSelection()
-    rr = sel.getRangeAt(0)
+    try:
+        rr = sel.getRangeAt(0)
+    except:
+        rr = None
     if rr:
         r = rr.getBoundingClientRect()
         if r:
diff --git a/src/pyj/read_book/paged_mode.pyj b/src/pyj/read_book/paged_mode.pyj
index f5b36a3ef3..bc17069196 100644
--- a/src/pyj/read_book/paged_mode.pyj
+++ b/src/pyj/read_book/paged_mode.pyj
@@ -569,7 +569,10 @@ def snap_to_selection():
 
 def ensure_selection_boundary_visible(use_end):
     sel = window.getSelection()
-    rr = sel.getRangeAt(0)
+    try:
+        rr = sel.getRangeAt(0)
+    except:
+        rr = None
     if rr:
         r = rr.getBoundingClientRect()
         if r: