diff --git a/source/build/src/defs.cpp b/source/build/src/defs.cpp
index e067971e5..6cda5fd9f 100644
--- a/source/build/src/defs.cpp
+++ b/source/build/src/defs.cpp
@@ -1326,27 +1326,8 @@ static int32_t defsparser(scriptfile *script)
         }
         break;
         case T_UNDEFPALOOKUPRANGE:
-        {
-            int32_t id0, id1;
-
-            if (scriptfile_getsymbol(script,&id0))
-                break;
-            if (scriptfile_getsymbol(script,&id1))
-                break;
-
-            if (id0 > id1 || (unsigned)id0 >= MAXPALOOKUPS || (unsigned)id1 >= MAXPALOOKUPS)
-            {
-                pos.Message(MSG_ERROR, "undefpalookuprange: Invalid range");
-                break;
-            }
-
-            for (bssize_t i = id0; i <= id1; i++)
-                lookups.clearTable(i);
-
-            if (id0 == 0)
-                paletteloaded &= ~PALETTE_SHADE;
-        }
-        break;
+            parseUndefPalookupRange(*script, pos);
+            break;
         case T_RFFDEFINEID:
             parseRffDefineId(*script, pos);
         break;
diff --git a/source/core/parsefuncs.h b/source/core/parsefuncs.h
index 41864dcd5..c8e677b44 100644
--- a/source/core/parsefuncs.h
+++ b/source/core/parsefuncs.h
@@ -1336,3 +1336,27 @@ void parseMakePalookup(FScanner& sc, FScriptPosition& pos)
 			remappal == 0 ? 1 : (nofloorpal == -1 ? lookups.tables[remappal].noFloorPal : nofloorpal));
 	}
 }
+
+//===========================================================================
+//
+// 
+//
+//===========================================================================
+
+void parseUndefPalookupRange(FScanner& sc, FScriptPosition& pos)
+{
+	int id0, id1;
+
+	if (!sc.GetNumber(id0, true)) return;
+	if (!sc.GetNumber(id1, true)) return;
+
+	if (id0 > id1 || (unsigned)id0 >= MAXPALOOKUPS || (unsigned)id1 >= MAXPALOOKUPS)
+	{
+		pos.Message(MSG_ERROR, "undefpalookuprange: Invalid range");
+	}
+	else
+	{
+		for (int i = id0; i <= id1; i++) lookups.clearTable(i);
+		if (id0 == 0) paletteloaded &= ~PALETTE_SHADE;
+	}
+}