diff -r 1505def01945 -r 2946a316540b src/newgrf.cpp
--- a/src/newgrf.cpp	Sat Dec 29 09:24:26 2007 +0000
+++ b/src/newgrf.cpp	Sat Dec 29 21:06:54 2007 +0000
@@ -950,6 +950,10 @@
 						ClrBit(dts->ground_pal, 15);
 						SetBit(dts->ground_sprite, SPRITE_MODIFIER_USE_OFFSET);
 					}
+					if (HasBit(dts->ground_pal, 14)) {
+						ClrBit(dts->ground_pal, 14);
+						SetBit(dts->ground_sprite, SPRITE_MODIFIER_OPAQUE);
+					}
 					if (HasBit(dts->ground_sprite, 15)) {
 						ClrBit(dts->ground_sprite, 15);
 						SetBit(dts->ground_sprite, PALETTE_MODIFIER_COLOR);
@@ -981,6 +985,10 @@
 							ClrBit(dtss->pal, 15);
 							SetBit(dtss->image, SPRITE_MODIFIER_USE_OFFSET);
 						}
+						if (HasBit(dtss->pal, 14)) {
+							ClrBit(dtss->pal, 14);
+							SetBit(dtss->image, SPRITE_MODIFIER_OPAQUE);
+						}
 
 						if (HasBit(dtss->image, 15)) {
 							ClrBit(dtss->image, 15);