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-rw-r--r--actionpack/lib/action_dispatch/routing/mapper.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 0c77183dc1..76c7ec35b9 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -726,7 +726,7 @@ module ActionDispatch
path = options.delete(:path)
action = args.first
- if action && action.to_s =~ /^[\w_]+$/
+ if action && action.to_s =~ /^[A-Za-z_]\w*$/
path = path_for_action(action, path)
options[:action] ||= action
options[:as] = name_for_action(action, options[:as])