diff --git a/polymer/eduke32/source/lunatic/bcheck.lua b/polymer/eduke32/source/lunatic/bcheck.lua
index 0b33726a7..f41ab5a92 100644
--- a/polymer/eduke32/source/lunatic/bcheck.lua
+++ b/polymer/eduke32/source/lunatic/bcheck.lua
@@ -4,8 +4,6 @@ local ffiC = require("ffi").C
 local type = type
 local error = error
 
-local con_lang = require("con_lang")
-
 local bcheck = {}
 
 --== ENGINE ==--
@@ -38,7 +36,27 @@ function bcheck.tile_idx(tilenum)
 end
 
 
+--== HELPERS ==--
+
+function bcheck.number(val, errlev)
+    if (type(val)~="number" or val~=val) then
+        error("invalid argument: must be a non-NaN number", errlev or 3)
+    end
+end
+
+function bcheck.type(val, typestr, errlev)
+    if (type(val)~=typestr) then
+        error("invalid argument: must be a "..typestr, errlev or 3)
+    end
+end
+
+
 --== GAME ==--
+if (ffiC.LUNATIC_CLIENT == ffiC.LUNATIC_CLIENT_MAPSTER32) then
+    return bcheck
+end
+
+local con_lang = require("con_lang")
 
 function bcheck.player_idx(snum)
     if (not (snum >= 0 and snum < ffiC.playerswhenstarted)) then
@@ -99,16 +117,4 @@ function bcheck.top_level(funcname)
     end
 end
 
-function bcheck.number(val, errlev)
-    if (type(val)~="number" or val~=val) then
-        error("invalid argument: must be a non-NaN number", errlev or 3)
-    end
-end
-
-function bcheck.type(val, typestr, errlev)
-    if (type(val)~=typestr) then
-        error("invalid argument: must be a "..typestr, errlev or 3)
-    end
-end
-
 return bcheck
diff --git a/polymer/eduke32/source/lunatic/defs_common.lua b/polymer/eduke32/source/lunatic/defs_common.lua
index 58f56f3e9..178dd4b5f 100644
--- a/polymer/eduke32/source/lunatic/defs_common.lua
+++ b/polymer/eduke32/source/lunatic/defs_common.lua
@@ -290,13 +290,8 @@ ffi.typeof(maybe_strip_const(SPRITE_STRUCT)))
 if (not _LUNATIC_AUX) then
     -- Define the "palette_t" type, which for us has .{r,g,b} fields and a
     -- bound-checking array of length 3 overlaid.
-    local rgbarray_t = require("bcarray").new("uint8_t", 3, "RGB array", "palette_t",
-                                              { "r", "g", "b", "f" })
-    ffi.cdef("typedef union { \
-        struct { uint8_t r, g, b, f; }; \
-        $ col; \
-    } palette_t", rgbarray_t)
-
+    require("bcarray").new("uint8_t", 3, "RGB array", "palette_t",
+                           { "r", "g", "b", "f" })
     assert(ffi.alignof("palette_t")==1)
 end