diff --git a/scripts/lua/host_details_categories.lua b/scripts/lua/host_details_categories.lua
deleted file mode 100644
index 06ac53d326..0000000000
--- a/scripts/lua/host_details_categories.lua
+++ /dev/null
@@ -1,58 +0,0 @@
---
--- (C) 2013-17 - ntop.org
---
-
-dirs = ntop.getDirs()
-package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
-
-require "lua_utils"
-require "graph_utils"
-
-host_ip = _GET["host"]
-ifid = _GET["ifid"]
-
-sendHTTPContentTypeHeader('text/html')
-
-interface.select(ifid)
-host_info = hostkey2hostinfo(host_ip)
-host_vlan = host_info["vlan"]
-host = interface.getHostInfo(host_info["host"], host_vlan)
-host_categories_rrd_creation = ntop.getCache("ntopng.prefs.host_categories_rrd_creation")
-
-if(host == nil) then
-   print("<div class=\"alert alert-danger\"><img src=".. ntop.getHttpPrefix() .. "/img/warning.png> Unable to find "..host_ip.." (data expired ?)</div>")
-   return
-end
-
-total = 0
-
-vals = {}
-
-if(host["categories"] ~= nil) then
-for k,v in pairs(host["categories"]) do
-  vals[k] = k
-  total = total + v
-  -- print(k)
-end
-table.sort(vals)
-end
-
-
-for _k,_label in pairsByKeys(vals , desc) do
-  label = getCategoryLabel(_label)
-  print("<tr><th>")
-  fname = getRRDName(ifid, hostinfo2hostkey(host_info), "categories/"..label..".rrd")
-  if ntop.exists(fname) then
-    print("<A HREF=\""..ntop.getHttpPrefix().."/lua/host_details.lua?ifid="..ifid.."&"..hostinfo2url(host_info) .. "&page=historical&rrd_file=categories/".. label ..".rrd\">"..label.."</A>")
-  else
-    print(label)
-  end
-  print("</th><td colspan=\"2\" class=\"text-right\">" .. bytesToSize(host["categories"][_label]) .. "</td>")
-  print("<td class=\"text-right\">" .. round((host["categories"][_label] * 100)/total, 2).. " %</td></tr>")
-end
-print("<tr><td colspan=\"4\"> <small> <b>NOTE</b>:<ul><li>Percentages are related only to classified traffic.")
-if host_categories_rrd_creation ~= "1" then
-  print("<li>Historical per-category traffic data can be enabled via ntopng <a href=\""..ntop.getHttpPrefix().."/lua/admin/prefs.lua\"<i class=\"fa fa-flask\"></i> Preferences</a>.")
-  print(" When enabled, RRDs with 5-minute samples will be created for each category detected and historical data will become accessible by clicking on each category. ")
-end
-print("</ul></small> </p></td></tr>")
diff --git a/scripts/lua/modules/graph_utils.lua b/scripts/lua/modules/graph_utils.lua
index ab1924333a..9ca4b4d968 100644
--- a/scripts/lua/modules/graph_utils.lua
+++ b/scripts/lua/modules/graph_utils.lua
@@ -1108,8 +1108,6 @@ function singlerrd2json(ifid, host, rrdFile, start_time, end_time, rickshaw_json
 
    if(prefixLabel == "Bytes") then
       prefixLabel = "Traffic"
-   elseif string.starts(rrdFile, "categories/") then
-      prefixLabel = prefixLabel.." Traffic"
    end
 
    if(string.contains(rrdFile, "num_") or string.contains(rrdFile, "tcp_") or string.contains(rrdFile, "packets") or string.contains(rrdFile, "drops")) then
@@ -1164,8 +1162,7 @@ function singlerrd2json(ifid, host, rrdFile, start_time, end_time, rickshaw_json
 	 end
 
 	 if host ~= nil and not string.starts(host, 'profile:')
-	    and protocol_categories[prefixLabel] == nil
-            and not string.starts(rrdFile, 'categories/') then
+	    and protocol_categories[prefixLabel] == nil then
 	     extra_info = extra_info..firstToUpper(n)
 	 end