diff --git a/app/models/backtrace.rb b/app/models/backtrace.rb
index 2637472..53defec 100644
--- a/app/models/backtrace.rb
+++ b/app/models/backtrace.rb
@@ -26,7 +26,7 @@ class Backtrace
 
   private
   def generate_fingerprint
-    self.fingerprint = Digest::SHA1.hexdigest(lines.map(&:fingerprint).join)
+    self.fingerprint = Digest::SHA1.hexdigest(lines.map(&:to_s).join)
   end
 
 end
diff --git a/app/models/backtrace_line.rb b/app/models/backtrace_line.rb
index e74fa1c..ff818f8 100644
--- a/app/models/backtrace_line.rb
+++ b/app/models/backtrace_line.rb
@@ -10,10 +10,6 @@ class BacktraceLine
 
   scope :in_app, where(:file => IN_APP_REGEXP)
 
-  def fingerprint
-    [number, file, method].join
-  end
-
   def to_s
     "#{file}:#{number}"
   end
--
libgit2 0.21.2