--- a/lib/xstrtod.c
+++ b/lib/xstrtod.c
@@ -1,4 +1,4 @@
-/* xstrtod.c - error-checking interface to strtod
+/* error-checking interface to strtod-like functions
    Copyright (C) 1996, 1999, 2000, 2003 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
@@ -26,7 +26,6 @@
 #include <errno.h>
 #include <limits.h>
 #include <stdio.h>
-#include <stdlib.h>
 
 /* Tell the compiler that non-default rounding modes are used.  */
 #if 199901 <= __STDC_VERSION__
@@ -36,10 +35,12 @@
 /* An interface to strtod that encapsulates all the error checking
    one should usually perform.  Like strtod, but upon successful
    conversion put the result in *RESULT and return zero.  Return
-   non-zero and don't modify *RESULT upon any failure.  */
+   non-zero and don't modify *RESULT upon any failure.  CONVERT
+   specifies the conversion function, e.g., strtod itself.  */
 
 int
-xstrtod (char const *str, char const **ptr, double *result)
+xstrtod (char const *str, char const **ptr, double *result,
+	 double (*convert) (char const *, char **))
 {
   double val;
   char *terminator;
@@ -47,7 +48,7 @@
 
   fail = 0;
   errno = 0;
-  val = strtod (str, &terminator);
+  val = convert (str, &terminator);
 
   /* Having a non-zero terminator is an error only when PTR is NULL. */
   if (terminator == str || (ptr == NULL && *terminator != '\0'))