diff --git a/app/models/profile_list_block.rb b/app/models/profile_list_block.rb
index a2224db..450d33b 100644
--- a/app/models/profile_list_block.rb
+++ b/app/models/profile_list_block.rb
@@ -21,7 +21,7 @@ class ProfileListBlock < Block
   end
 
   def randomizer
-    @randomizer ||= "(profiles.id % #{rand(profile_count)})"
+    @randomizer ||= "(profiles.id % #{rand(profile_count + 1)})"
   end
 
   # the title of the block. Probably will be overriden in subclasses.
diff --git a/test/unit/profile_list_block_test.rb b/test/unit/profile_list_block_test.rb
index 1eb8a39..9d50df8 100644
--- a/test/unit/profile_list_block_test.rb
+++ b/test/unit/profile_list_block_test.rb
@@ -153,7 +153,7 @@ class ProfileListBlockTest < Test::Unit::TestCase
   should 'randomize using modulo operator and random number' do
     block = ProfileListBlock.new
     block.expects(:profile_count).returns(10)
-    block.expects(:rand).with(10).returns(5)
+    block.expects(:rand).with(11).returns(5)
     assert_match /profiles.id % 5/, block.randomizer
   end
 
--
libgit2 0.21.2