diff --git a/app/models/region.rb b/app/models/region.rb
index 03e5ea4..f86cb91 100644
--- a/app/models/region.rb
+++ b/app/models/region.rb
@@ -16,7 +16,7 @@ class Region < Category
   end
 
   def self.with_validators
-    Region.find(:all, :joins => 'INNER JOIN region_validators on (region_validators.region_id = categories.id)')
+    Region.find(:all, :joins => 'INNER JOIN region_validators on (region_validators.region_id = categories.id)', :select => "distinct #{table_name}.*")
   end
   
 end
diff --git a/test/unit/region_test.rb b/test/unit/region_test.rb
index aad03a9..16b6896 100644
--- a/test/unit/region_test.rb
+++ b/test/unit/region_test.rb
@@ -55,13 +55,18 @@ class RegionTest < Test::Unit::TestCase
 
   should 'list regions with validators' do
     bahia = fast_create(Region, :name => 'Bahia')
-    forum_ecosol_ba = fast_create(Enterprise, :name => 'Forum Baiano de Economia Solidaria', :identifier => 'ecosol-ba')
-    bahia.validators << forum_ecosol_ba
+    bahia.validators << fast_create(Enterprise, :name => 'Forum Baiano de Economia Solidaria', :identifier => 'ecosol-ba')
 
     sergipe = fast_create(Region, :name => 'Sergipe')
     # Sergipe has no validators
 
-    assert_equivalent Region.with_validators, [bahia]
+    assert_equivalent [bahia], Region.with_validators
+  end
+
+  should 'list each region with validatores only once' do
+    bahia = fast_create(Region, :name => 'Bahia')
+    2.times { |i| bahia.validators << fast_create(Enterprise, :name => "validator #{i}", :identifier => "validator-#{i}")}
+    assert_equal [bahia], Region.with_validators
   end
 
 end
--
libgit2 0.21.2