diff --git a/sys/ia64/include/float.h b/sys/ia64/include/float.h
index 0420ffb356b3..41948190544a 100644
--- a/sys/ia64/include/float.h
+++ b/sys/ia64/include/float.h
@@ -39,12 +39,8 @@
 
 #include <sys/cdefs.h>
 
-__BEGIN_DECLS
-int	__flt_rounds __P((void));
-__END_DECLS
-
 #define FLT_RADIX	2		/* b */
-#define FLT_ROUNDS	__flt_rounds()
+#define FLT_ROUNDS	1		/* FP addition rounds to nearest */
 
 #define FLT_MANT_DIG	24		/* p */
 #define FLT_EPSILON	1.19209290E-07F	/* b**(1-p) */