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diff --git a/sysdeps/libm-ieee754/s_significandl.c b/sysdeps/libm-ieee754/s_significandl.c
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+/* s_significandl.c -- long double version of s_significand.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/*
+ * significandl(x) computes just
+ * 	scalbl(x, (double) -ilogbl(x)),
+ * for exercising the fraction-part(F) IEEE 754-1985 test vector.
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+	long double __significandl(long double x)
+#else
+	long double __significandl(x)
+	long double x;
+#endif
+{
+	return __ieee754_scalbl(x,(double) -ilogbl(x));
+}
+weak_alias (__significandl, significandl)