diff --git a/attic/scripts/lua/rest/v1/get/alert/type/counters.lua b/attic/scripts/lua/rest/v1/get/alert/type/counters.lua
index f4c82241ae..0905730541 100644
--- a/attic/scripts/lua/rest/v1/get/alert/type/counters.lua
+++ b/attic/scripts/lua/rest/v1/get/alert/type/counters.lua
@@ -29,7 +29,7 @@ local what = _GET["status"] -- historical, historical-flows
 local epoch_begin = _GET["epoch_begin"]
 local epoch_end = _GET["epoch_end"]
 
-if isEmptyString(ifid) then
+if isEmptyString(ifid) or not interface.isValidIfId(ifid) then
    print(rest_utils.rc(rest_utils.consts.err.invalid_interface))
    return
 end