diff --git a/lua/cfc_http_restrictions/client/wrap_functions.lua b/lua/cfc_http_restrictions/client/wrap_functions.lua
index 6262d1f..acb76f6 100644
--- a/lua/cfc_http_restrictions/client/wrap_functions.lua
+++ b/lua/cfc_http_restrictions/client/wrap_functions.lua
@@ -97,8 +97,13 @@ local function wrapPost()
     end
 end
 
+-- the URI was blocked because it was not in the whitelist
+CFCHTTP.BASS_ERROR_BLOCKED_URI = 11001
+-- unused: the request was blocked after inspecting the content
+-- this is likely because the content could result in playing blocked URIs
+CFCHTTP.BASS_ERROR_BLOCKED_CONTENT = 11002
+
 local function wrapPlayURL()
-    local BASS_ERROR_ILLPARAM = 20
     _sound_PlayURL = _sound_PlayURL or sound.PlayURL
     print( "sound.PlayURL wrapped, original function at _sound_PlayUrl" )
 
@@ -110,7 +115,7 @@ local function wrapPlayURL()
         local stack = string.Split( debug.traceback(), "\n" )
         logRequest( "GET", url, stack[3], isAllowed, noisy )
         if not isAllowed then
-            if callback then callback( nil, BASS_ERROR_ILLPARAM, "BASS_ERROR_ILLPARAM" ) end
+            if callback then callback( nil, CFCHTTP.BASS_ERROR_BLOCKED_URI, "BASS_ERROR_BLOCKED_URI" ) end
             return
         end
         _sound_PlayURL( url, flags, callback )
@@ -129,8 +134,8 @@ local function wrapHTMLPanel( panelName )
     local setHTML = funcName( "SetHTML" )
     local openURL = funcName( "OpenURL" )
 
-    _G[setHTML] =  _G[setHTML] or controlTable.SetHTML
-    _G[openURL] =  _G[openURL] or controlTable.OpenURL
+    _G[setHTML] = _G[setHTML] or controlTable.SetHTML
+    _G[openURL] = _G[openURL] or controlTable.OpenURL
 
     controlTable.SetHTML = function( self, html, ... )
         local isAllowed, url = CFCHTTP.isHTMLAllowed( html )