diff --git a/source/common/engine/namedef.h b/source/common/engine/namedef.h
index 8be149bea..cf8b8da62 100644
--- a/source/common/engine/namedef.h
+++ b/source/common/engine/namedef.h
@@ -525,6 +525,7 @@ xx(ZDoom)
 xx(ZDoomTranslated)
 xx(Vavoom)
 xx(GZDoom)
+xx(Eternity)
 
 xx(Xpanningfloor)
 xx(Ypanningfloor)
diff --git a/source/games/sw/src/game.cpp b/source/games/sw/src/game.cpp
index d20b6dee6..ec39e50a8 100644
--- a/source/games/sw/src/game.cpp
+++ b/source/games/sw/src/game.cpp
@@ -349,6 +349,11 @@ void InitLevel(MapRecord *maprec)
     engineLoadBoard(maprec->fileName, SW_SHAREWARE ? 1 : 0, &Player[0].pos, &ang, &Player[0].cursectnum);
     currentLevel = maprec;
 
+    if (!maprec->labelName.CompareNoCase("$hidtemp") && !maprec->name.CompareNoCase("$TXTS_T_MAP10"))
+    {
+        // flip the inverted card reader in TD's level 10.
+        if (sprite[179].picnum == 1852 && sprite[179].cstat == 92) sprite[179].cstat &= ~12;
+    }
     if (!maprec->labelName.CompareNoCase("$outpost") && !maprec->name.CompareNoCase("$TXTS_MAP09"))
     {
         // silence a misplaced and *very* annoying ambient sound.