diff --git a/app/models/validators/range_overlapping_validator.rb b/app/models/validators/range_overlapping_validator.rb
index 5be96df..cb15715 100644
--- a/app/models/validators/range_overlapping_validator.rb
+++ b/app/models/validators/range_overlapping_validator.rb
@@ -21,6 +21,7 @@ class RangeOverlappingValidator < ActiveModel::Validator
   def to_float(value)
     return 1.0/0 if value=="INF"
     return -1.0/0 if value=="-INF"
+    return value.to_f if value.is_a?(String)
     return value
   end
 end
diff --git a/features/mezuro_range/create.feature b/features/mezuro_range/create.feature
index 28914b6..5d2f1ea 100644
--- a/features/mezuro_range/create.feature
+++ b/features/mezuro_range/create.feature
@@ -158,4 +158,28 @@ Feature: Create range
     When I press the Save button
     Then I should be at metric configuration sample page
     And I should see "-INF"
+    And I should see "INF"
+
+  @kalibro_restart @javascript
+  Scenario: Two valid ranges (one with INF)
+    Given I am a regular user
+    And I am signed in
+    And I own a sample configuration
+    And I own a sample reading group
+    And I have a sample metric configuration within the given mezuro configuration
+    And I have a sample reading within the sample reading group labeled "My Reading"
+    And I am at the New Range page
+    And I fill the Beginning field with "2"
+    And I fill the End field with "666"
+    And I fill the Comments field with "My Comment"
+    And I set the select field "Reading" as "My Reading"
+    And I press the Save button
+    And I am at the New Range page
+    And I fill the Beginning field with "666"
+    And I click the ∞ link
+    And I fill the Comments field with "My Comment"
+    And I set the select field "Reading" as "My Reading"
+    When I press the Save button
+    Then I should be at metric configuration sample page
+    And I should see "666"
     And I should see "INF"
\ No newline at end of file
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