diff --git a/app/controllers/listed_taxa_controller.rb b/app/controllers/listed_taxa_controller.rb
index a289e8a66fa..4f3b6352ffd 100644
--- a/app/controllers/listed_taxa_controller.rb
+++ b/app/controllers/listed_taxa_controller.rb
@@ -153,7 +153,7 @@ def destroy
   private
   
   def load_listed_taxon
-    unless @listed_taxon = ListedTaxon.find_by_id(params[:id], :include => [:list, :taxon, :user])
+    unless @listed_taxon = ListedTaxon.find_by_id(params[:id].to_i, :include => [:list, :taxon, :user])
       flash[:notice] = "That listed taxon doesn't exist."
       redirect_back_or_default('/')
       return