diff --git a/ippisite/ippidb/templates/base.html b/ippisite/ippidb/templates/base.html
index da906635a5528ef111a48a18e9ec3a226bea76fa..04559d240e0b3c6994d3687780e1407ce31e138b 100644
--- a/ippisite/ippidb/templates/base.html
+++ b/ippisite/ippidb/templates/base.html
@@ -45,7 +45,7 @@
             var removeFromSelection = function(paramName, value){ 
                 var url = new URL(location.href);
                 var selectedValues = url.searchParams.getAll(paramName);
-                selectedValues.splice(selectedValues.indexOf(value));
+                selectedValues.splice(selectedValues.indexOf(value), 1);
                 modifyUrl(paramName, selectedValues); 
             }
             var multiselectTypeAhead = function(idSearch, selection, onSelect){