http://bugs.gentoo.org/180619

--- usr/isns.c
+++ usr/isns.c
@@ -215,13 +215,13 @@
 
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 #define set_scn_flag(x)						\
-{								\
+({								\
 	x = (x & 0x55555555) << 1 | (x & 0xaaaaaaaa) >> 1;	\
 	x = (x & 0x33333333) << 2 | (x & 0xcccccccc) >> 2;	\
 	x = (x & 0x0f0f0f0f) << 4 | (x & 0xf0f0f0f0) >> 4;	\
 	x = (x & 0x00ff00ff) << 8 | (x & 0xff00ff00) >> 8;	\
 	x = (x & 0x0000ffff) << 16 | (x & 0xffff0000) >> 16;	\
-}
+})
 #else
 #define set_scn_flag(x) (x)
 #endif