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-rw-r--r--lib/rbot/messagemapper.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rbot/messagemapper.rb b/lib/rbot/messagemapper.rb
index ca076e4a..c222ee71 100644
--- a/lib/rbot/messagemapper.rb
+++ b/lib/rbot/messagemapper.rb
@@ -384,7 +384,7 @@ class Bot
mul = multi? ? " multi" : " single"
opt = optional? ? " optional" : " needed"
if @regexp
- reg = " regexp=%s index=%d" % [@regexp, @index]
+ reg = " regexp=%s index=%s" % [@regexp, @index]
else
reg = nil
end