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-rw-r--r--bits/byteswap-16.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/bits/byteswap-16.h b/bits/byteswap-16.h
index 078dd0e17a..6cc1d30932 100644
--- a/bits/byteswap-16.h
+++ b/bits/byteswap-16.h
@@ -23,7 +23,8 @@
#ifdef __GNUC__
# define __bswap_16(x) \
(__extension__ \
- ({ unsigned short int __bsx = (x); __bswap_constant_16 (__bsx); }))
+ ({ unsigned short int __bsx = (unsigned short int) (x); \
+ __bswap_constant_16 (__bsx); }))
#else
static __inline unsigned short int
__bswap_16 (unsigned short int __bsx)