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-rw-r--r--sysdeps/ieee754/ieee754.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ieee754.h b/sysdeps/ieee754/ieee754.h
index 9e6efe4973..ba40cc7683 100644
--- a/sysdeps/ieee754/ieee754.h
+++ b/sysdeps/ieee754/ieee754.h
@@ -16,8 +16,15 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#ifndef _IEEE754_H
+
+#define _IEEE754_H 1
+#include <features.h>
+
 #include <endian.h>
 
+__BEGIN_DECLS
+
 union ieee754_float
   {
     float f;
@@ -153,3 +160,7 @@ union ieee854_long_double
   };
 
 #define IEEE854_LONG_DOUBLE_BIAS 0x3fff
+
+__END_DECLS
+
+#endif /* ieee754.h */