diff --git a/app/helpers/repositories_helper.rb b/app/helpers/repositories_helper.rb
index 36cd90f..c873e1c 100644
--- a/app/helpers/repositories_helper.rb
+++ b/app/helpers/repositories_helper.rb
@@ -156,12 +156,18 @@ module RepositoriesHelper
               :undef => :replace, :replace => '?').encode("UTF-8")
       end
     else
-      # removes invalid UTF8 sequences
+      ic = Iconv.new('UTF-8', 'UTF-8')
+      txtar = ""
       begin
-        str = Iconv.conv('UTF-8//IGNORE', 'UTF-8', str + '  ')[0..-3]
-      rescue Iconv::InvalidEncoding
-        # "UTF-8//IGNORE" is not supported on some OS
+        txtar += ic.iconv(str)
+      rescue Iconv::IllegalSequence
+        txtar += $!.success
+        str = '?' + $!.failed[1,$!.failed.length]
+        retry
+      rescue
+        txtar += $!.success
       end
+      str = txtar
     end
     str
   end
diff --git a/test/unit/helpers/repository_helper_test.rb b/test/unit/helpers/repository_helper_test.rb
index 9532c30..a1c778e 100644
--- a/test/unit/helpers/repository_helper_test.rb
+++ b/test/unit/helpers/repository_helper_test.rb
@@ -94,12 +94,10 @@ class RepositoryHelperTest < HelperTestCase
       s1.force_encoding("ASCII-8BIT") if s1.respond_to?(:force_encoding)
       str = to_utf8(s1)
       if str.respond_to?(:force_encoding)
-        assert_equal "Texte encod? en ISO-8859-1.", str
         assert str.valid_encoding?
         assert_equal "UTF-8", str.encoding.to_s
-      else
-        assert_equal "Texte encod en ISO-8859-1.", str
       end
+      assert_equal "Texte encod? en ISO-8859-1.", str
     end
   end
 end