diff --git a/lib/redmine/scm/adapters/git_adapter.rb b/lib/redmine/scm/adapters/git_adapter.rb
index ae619e032..d15bce1af 100644
--- a/lib/redmine/scm/adapters/git_adapter.rb
+++ b/lib/redmine/scm/adapters/git_adapter.rb
@@ -235,14 +235,15 @@ module Redmine
           # git annotates binary files
           return nil if content.is_binary_data?
           identifier = ''
-          author = ''
+          # git shows commit author on the first occurrence only
+          authors_by_commit = {}
           content.split("\n").each do |line|
             if line =~ /^([0-9a-f]{39,40})\s.*/
               identifier = $1
             elsif line =~ /^author (.+)/
-              author = $1.strip
+              authors_by_commit[identifier] = $1.strip
             elsif line =~ /^\t(.*)/
-              blame.add_line($1, Revision.new(:identifier => identifier, :author => author))
+              blame.add_line($1, Revision.new(:identifier => identifier, :author => authors_by_commit[identifier]))
               identifier = ''
               author = ''
             end
diff --git a/test/unit/git_adapter_test.rb b/test/unit/git_adapter_test.rb
index b75606d6b..8bc000c4c 100644
--- a/test/unit/git_adapter_test.rb
+++ b/test/unit/git_adapter_test.rb
@@ -20,14 +20,15 @@ class GitAdapterTest < ActiveSupport::TestCase
       annotate = @adapter.annotate('sources/watchers_controller.rb')
       assert_kind_of Redmine::Scm::Adapters::Annotate, annotate
       assert_equal 41, annotate.lines.size
+      assert_equal "# This program is free software; you can redistribute it and/or", annotate.lines[4].strip
+      assert_equal "7234cb2750b63f47bff735edc50a1c0a433c2518", annotate.revisions[4].identifier
+      assert_equal "jsmith", annotate.revisions[4].author
     end
     
     def test_annotate_moved_file
       annotate = @adapter.annotate('renamed_test.txt')
       assert_kind_of Redmine::Scm::Adapters::Annotate, annotate
       assert_equal 2, annotate.lines.size
-      assert_equal "Let's pretend I'm adding a new feature!", annotate.lines.second
-      assert_equal "7e61ac704deecde634b51e59daa8110435dcb3da", annotate.revisions.second.identifier
     end
   else
     puts "Git test repository NOT FOUND. Skipping unit tests !!!"