diff -r 8bb4cdc7c5cc -r 6909973c8359 src/vehicle_gui.cpp
--- a/src/vehicle_gui.cpp	Sun Nov 04 22:24:03 2007 +0000
+++ b/src/vehicle_gui.cpp	Sun Nov 04 22:47:34 2007 +0000
@@ -485,7 +485,7 @@
 	char *b = _userstring;
 
 	/* Draw nothing if the engine is not refittable */
-	if (COUNTBITS(cmask) <= 1) return 0;
+	if (CountBits(cmask) <= 1) return 0;
 
 	b = InlineString(b, STR_PURCHASE_INFO_REFITTABLE_TO);
 
@@ -495,7 +495,7 @@
 	} else {
 		/* Check if we are able to refit to more cargo types and unable to. If
 		 * so, invert the cargo types to list those that we can't refit to. */
-		if (COUNTBITS(cmask ^ lmask) < COUNTBITS(cmask)) {
+		if (CountBits(cmask ^ lmask) < CountBits(cmask)) {
 			cmask ^= lmask;
 			b = InlineString(b, STR_PURCHASE_INFO_ALL_BUT);
 		}