diff --git a/app/models/repository/cvs.rb b/app/models/repository/cvs.rb
index 7c01a27..c2d8be9 100644
--- a/app/models/repository/cvs.rb
+++ b/app/models/repository/cvs.rb
@@ -138,12 +138,18 @@ class Repository::Cvs < Repository
       end
       
       # Renumber new changesets in chronological order
-      c = changesets.find(:first, :order => 'committed_on DESC, id DESC', :conditions => "revision NOT LIKE '_%'")
-      next_rev = c.nil? ? 1 : (c.revision.to_i + 1)
       changesets.find(:all, :order => 'committed_on ASC, id ASC', :conditions => "revision LIKE '_%'").each do |changeset|
-        changeset.update_attribute :revision, next_rev
-        next_rev += 1
+        changeset.update_attribute :revision, next_revision_number
       end
     end # transaction
   end
+  
+  private
+  
+  # Returns the next revision number to assign to a CVS changeset
+  def next_revision_number
+    # Need to retrieve existing revision numbers to sort them as integers
+    @current_revision_number ||= (connection.select_values("SELECT revision FROM #{Changeset.table_name} WHERE repository_id = #{id} AND revision NOT LIKE '_%'").collect(&:to_i).max || 0)
+    @current_revision_number += 1
+  end
 end