diff --git a/arch/powerpc/kernel/smp-tbsync.c b/arch/powerpc/kernel/smp-tbsync.c
index de59c6c31a5b81f1cc3f28ff12af611d4b558df5..e1970f83f14abee0bb6d18e9f4f7856d5f76ae55 100644
--- a/arch/powerpc/kernel/smp-tbsync.c
+++ b/arch/powerpc/kernel/smp-tbsync.c
@@ -78,7 +78,7 @@ static int __devinit start_contest(int cmd, long offset, int num)
 {
 	int i, score=0;
 	u64 tb;
-	long mark;
+	u64 mark;
 
 	tbsync->cmd = cmd;