diff --git a/polymer/eduke32/source/gamedef.h b/polymer/eduke32/source/gamedef.h
index b09b4a340..4cefd5e06 100644
--- a/polymer/eduke32/source/gamedef.h
+++ b/polymer/eduke32/source/gamedef.h
@@ -948,6 +948,7 @@ enum ScriptKeywords_t
     CON_SCREENSOUND,        // 372
     CON_END
 };
+// KEEPINSYNC with the keyword list in lunatic/con_lang.lua
 #endif
 
 
diff --git a/polymer/eduke32/source/lunatic/con_lang.lua b/polymer/eduke32/source/lunatic/con_lang.lua
index da0972c86..90b920ba5 100644
--- a/polymer/eduke32/source/lunatic/con_lang.lua
+++ b/polymer/eduke32/source/lunatic/con_lang.lua
@@ -945,6 +945,7 @@ lpeg.P(false) +
 "sectclearinterpolation" +
 "scriptsize" +
 "screentext" +
+"screensound" +
 "savenn" +
 "savemapstate" +
 "savegamevar" +
diff --git a/polymer/eduke32/source/lunatic/lunacon.lua b/polymer/eduke32/source/lunatic/lunacon.lua
index fb3e2fc28..12cc71196 100644
--- a/polymer/eduke32/source/lunatic/lunacon.lua
+++ b/polymer/eduke32/source/lunatic/lunacon.lua
@@ -1124,7 +1124,7 @@ function Cmd.xspriteflags(tilenum, flags)
             ffiC.g_tile[tilenum]._flags = flags
         else
             assert(type(flags)=="string")
-            ffiC.g_tile[tilenum]._flags = bit.bor(ffiC.g_tile[tilenum].flags, ffiC[flags])
+            ffiC.g_tile[tilenum]._flags = bit.bor(ffiC.g_tile[tilenum]._flags, ffiC[flags])
         end
     end
 end