diff --git a/app/models/filtered_column.rb b/app/models/filtered_column.rb
index cd1e1f774..c861b7338 100644
--- a/app/models/filtered_column.rb
+++ b/app/models/filtered_column.rb
@@ -33,7 +33,7 @@ class FilteredColumn
   private
 
   def check_filter_max_length
-    if @filter.present? && @filter.length.to_i > FILTERS_VALUE_MAX_LENGTH
+    if @filter.present? && @filter.length > FILTERS_VALUE_MAX_LENGTH
       errors.add(
         :base,
         "Le filtre « #{label} » est trop long (maximum: #{FILTERS_VALUE_MAX_LENGTH} caractères)"