diff --git a/lib/msun/Makefile b/lib/msun/Makefile
index 225c11a8385b..4e7439155b8a 100644
--- a/lib/msun/Makefile
+++ b/lib/msun/Makefile
@@ -52,7 +52,7 @@ ARCH_SRCS = s_copysign.S s_copysignf.S
 ARCH=	i387
 ARCH_SRCS = e_acos.S e_asin.S e_atan2.S e_exp.S e_fmod.S e_log.S e_log10.S \
 	    e_remainder.S e_scalb.S e_sqrt.S s_atan.S s_ceil.S s_copysign.S \
-	    s_cos.S s_finite.S s_floor.S s_ilogb.S s_logb.S \
+	    s_cos.S s_finite.S s_floor.S s_logb.S \
 	    s_rint.S s_scalbn.S s_significand.S s_sin.S s_tan.S
 # Broken:
 # ARCH_SRCS+=	s_log1p.S
diff --git a/lib/msun/i387/s_ilogb.S b/lib/msun/i387/s_ilogb.S
deleted file mode 100644
index 34497a8f4040..000000000000
--- a/lib/msun/i387/s_ilogb.S
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Copyright (c) 1994 Winning Strategies, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *      This product includes software developed by Winning Strategies, Inc.
- * 4. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Written by:
- *	J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
- */
-
-#include <machine/_limits.h>
-#include <machine/asm.h>
-
-RCSID("$FreeBSD$")
-
-#define	FP_ILOGB0	(-__INT_MAX)
-#define	FP_ILOGBNAN	__INT_MAX
-#define	FP_ILOGBINF	__INT_MAX
-
-ENTRY(ilogb)
-	pushl	%ebp
-	movl	%esp,%ebp
-	subl	$4,%esp
-
-	fldl	8(%ebp)
-	fxtract
-	fstp	%st(0)
-
-	fistpl	-4(%ebp)
-	movl	-4(%ebp),%eax
-
-	/* fistpl yields __INT_MIN for NaN, Inf and 0. */
-	cmpl	$__INT_MIN,%eax
-	je	.L2
-
-.L1:
-	leave
-	ret
-
-.L2:
-	fldl	8(%ebp)
-	fldz
-	fucompp
-	fnstsw	%ax
-	sahf
-	jp	.L3
-	jz	.L4
-
-	movl	$FP_ILOGBINF,%eax
-	jmp	.L1
-
-.L3:
-	movl	$FP_ILOGBNAN,%eax
-	jmp	.L1
-
-.L4:
-	movl	$FP_ILOGB0,%eax
-	jmp	.L1