diff --git a/app/controllers/quality_analysis_controller.rb b/app/controllers/quality_analysis_controller.rb
index 365889640..4e522ec73 100644
--- a/app/controllers/quality_analysis_controller.rb
+++ b/app/controllers/quality_analysis_controller.rb
@@ -252,7 +252,7 @@ class QualityAnalysisController < ApplicationController
           unresolved_issue_count = JSON.parse(unresolved_issues)["total"].to_i
           all_issues = open(@sonar_address + "/api/issues/search?projectKeys=#{@resource_id}&authors=#{email}").read
           all_issue_count = JSON.parse(all_issues)["total"].to_i
-          ratio = (changes == 0 ? 0 : format("%0.4f",unresolved_issue_count.to_f/changes.to_f))
+          ratio = ((changes == 0 || all_issue_count == 0) ? 0 : format("%0.4f",all_issue_count.to_f/changes.to_f))
           @user_quality_infos << {:email => email, :changes => changes, :unresolved_issue_count => unresolved_issue_count, :ratio => ratio, :all_issue_count => all_issue_count}
         end