Index: src/Core/OOTrumble.m
--- src/Core/OOTrumble.m.orig
+++ src/Core/OOTrumble.m
@@ -30,6 +30,7 @@ MA 02110-1301, USA.
 #import "OOSound.h"
 #import "OOStringParsing.h"
 
+float trumbleAppetiteAccumulator;
 
 static void InitTrumbleSounds(void);
 static void PlayTrumbleIdle(void);
