Index: test/unit/custom_field_test.rb
===================================================================
--- test/unit/custom_field_test.rb	(revision 12224)
+++ test/unit/custom_field_test.rb	(working copy)
@@ -227,6 +227,24 @@
     assert_equal 2, item_with_multiple_values.custom_field_value(other).size
   end
 
+  def test_searchable_should_be_set_for_string_text_list_custom_field_formats_only
+    Redmine::CustomFieldFormat.available_formats.each do |format|
+      if format == 'list'
+        field = CustomField.new(:name => 'test_searchable_list_cf', :field_format => format, :possible_values => ['v1', 'v2'])
+      else
+        field = CustomField.new(:name => 'test_searchable_' + format + '_cf', :field_format => format)
+      end
+      field.searchable = true
+      assert field.save
+      case format
+        when 'string', 'text', 'list'
+          assert_equal true, field.searchable, format + " custom field isn't searchable while it should"
+        when 'int', 'float', 'date', 'bool', 'user', 'version'
+          assert_equal false, field.searchable, format + " custom field is searchable while it shouldn't"
+      end
+    end
+  end
+
   def test_value_class_should_return_the_class_used_for_fields_values
     assert_equal User, CustomField.new(:field_format => 'user').value_class
     assert_equal Version, CustomField.new(:field_format => 'version').value_class
Index: app/models/custom_field.rb
===================================================================
--- app/models/custom_field.rb	(revision 12224)
+++ app/models/custom_field.rb	(working copy)
@@ -64,7 +64,7 @@
 
   def set_searchable
     # make sure these fields are not searchable
-    self.searchable = false if %w(int float date bool).include?(field_format)
+    self.searchable = false if %w(int float date bool user version).include?(field_format)
     # make sure only these fields can have multiple values
     self.multiple = false unless %w(list user version).include?(field_format)
     true