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-rw-r--r--lib/sisu/ao_numbering.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sisu/ao_numbering.rb b/lib/sisu/ao_numbering.rb
index c8bafc23..777c5a44 100644
--- a/lib/sisu/ao_numbering.rb
+++ b/lib/sisu/ao_numbering.rb
@@ -590,7 +590,7 @@ module SiSU_AO_Numbering
: @segname
tags["#{dob.ocn}"]={ segname: @segname }
ocn_html_seg[dob.ocn]=if (dob.is==:heading || dob.is==:heading_insert)
- if dob.ln =~/[0-3]/
+ if dob.ln.to_s =~/[0-3]/
{
seg: nil,
level: dob.ln,