diff --git a/Lib/idlelib/FormatParagraph.py b/Lib/idlelib/FormatParagraph.py
index ed9f28d..f30898e 100644
--- a/Lib/idlelib/FormatParagraph.py
+++ b/Lib/idlelib/FormatParagraph.py
@@ -75,6 +75,7 @@
         else:
             text.mark_set("insert", last)
         text.see("insert")
+        return "break"
 
 def find_paragraph(text, mark):
     lineno, col = map(int, mark.split("."))
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index aa7419f..5c08a92 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,8 @@
 
 *Release date: XX-FEB-2008*
 
+- format_paragraph_event wasn't returning a 'break' (backport r59453)
+
 - Corrected some bugs in AutoComplete.  Also, Page Up/Down in ACW implemented;                                                                               
   mouse and cursor selection in ACWindow implemented; double Tab inserts      
   current selection and closes ACW (similar to double-click and Return); scroll