diff --git a/src/calibre/gui2/convert/search_and_replace.py b/src/calibre/gui2/convert/search_and_replace.py
index fff75a29ba..34c6cdf1e9 100644
--- a/src/calibre/gui2/convert/search_and_replace.py
+++ b/src/calibre/gui2/convert/search_and_replace.py
@@ -36,7 +36,7 @@ class SearchAndReplaceWidget(Widget, Ui_Form):
         self.opt_sr3_search.break_cycles()
 
     def pre_commit_check(self):
-        for x in ('sr1-search', 'sr2-search', 'sr3-search'):
+        for x in ('sr1_search', 'sr2_search', 'sr3_search'):
             x = getattr(self, 'opt_'+x)
             try:
                 pat = unicode(x.regex)