diff --git a/app/views/notices/_backtrace.html.haml b/app/views/notices/_backtrace.html.haml
index 66a7893..2f44a13 100644
--- a/app/views/notices/_backtrace.html.haml
+++ b/app/views/notices/_backtrace.html.haml
@@ -7,7 +7,7 @@
       %tr
         %td.line{:class => (Notice.in_app_backtrace_line?(line) ? 'in-app' : nil)}
           %span.path>= path
-          %span.file= line['number'].blank? ? file : ("#{file}:" << line_number_with_link(@app, line)).html_safe
+          %span.file= line['number'].blank? ? file : ("#{file}:" + line_number_with_link(@app, line).to_s).html_safe
           &rarr;
           %span.method= line['method']
 
--
libgit2 0.21.2