diff --git a/include/asm-parisc/bitops.h b/include/asm-parisc/bitops.h
index 15d8c2b5158408b13588229a0581b0577eae4f7a..ca6119af20af18cf90172331c3af014a3a3e643a 100644
--- a/include/asm-parisc/bitops.h
+++ b/include/asm-parisc/bitops.h
@@ -220,7 +220,7 @@ static __inline__ unsigned long __ffs(unsigned long x)
 }
 
 /* Undefined if no bit is zero. */
-#define ffz(x)	__ffs(~x)
+#define ffz(x)	__ffs(~(x))
 
 /*
  * ffs: find first bit set. returns 1 to BITS_PER_LONG or 0 (if none set)