diff --git a/lib/libc/arch/m68k/gen/isnanl.c b/lib/libc/arch/m68k/gen/isnanl.c
index 8639d3114a56..f26467a15dbc 100644
--- a/lib/libc/arch/m68k/gen/isnanl.c
+++ b/lib/libc/arch/m68k/gen/isnanl.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: isnanl.c,v 1.3 2003/10/27 01:11:46 kleink Exp $	*/
+/*	$NetBSD: isnanl.c,v 1.4 2003/10/28 00:13:22 kleink Exp $	*/
 
 /*
  * Copyright (c) 1992, 1993
@@ -40,7 +40,7 @@
 #if 0
 static char sccsid[] = "@(#)isinf.c	8.1 (Berkeley) 6/4/93";
 #else
-__RCSID("$NetBSD: isnanl.c,v 1.3 2003/10/27 01:11:46 kleink Exp $");
+__RCSID("$NetBSD: isnanl.c,v 1.4 2003/10/28 00:13:22 kleink Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -61,7 +61,7 @@ isnanl(long double ld)
 	union ieee_ext_u u;
 
 	u.extu_ld = ld;
+	/* Note: the explicit integer bit is "don't care". */
 	return (u.extu_ext.ext_exp == EXT_EXP_INFNAN &&
-	    (u.extu_ext.ext_int != 0 ||
-	     u.extu_ext.ext_frach != 0 || u.extu_ext.ext_fracl != 0));
+	    (u.extu_ext.ext_frach != 0 || u.extu_ext.ext_fracl != 0));
 }