diff --git a/build-aux/configure-lib.sh b/build-aux/configure-lib.sh
index 0cecaccf..0831f210 100644
--- a/build-aux/configure-lib.sh
+++ b/build-aux/configure-lib.sh
@@ -249,6 +249,7 @@ lib/stdlib/abort.c
 lib/stdlib/abs.c
 lib/stdlib/alloca.c
 lib/stdlib/atexit.c
+lib/stdlib/atof.c
 lib/stdlib/atol.c
 lib/stdlib/mbstowcs.c
 lib/string/bcmp.c
diff --git a/lib/stub/atof.c b/lib/stdlib/atof.c
similarity index 87%
rename from lib/stub/atof.c
rename to lib/stdlib/atof.c
index 19f6771d..8bcacfcf 100644
--- a/lib/stub/atof.c
+++ b/lib/stdlib/atof.c
@@ -20,12 +20,9 @@
 
 #include <mes/lib.h>
 
-int
-atof (int x)
+double
+atof (char const *string)
 {
-  static int stub = 0;
-  if (__mes_debug () && !stub)
-    eputs ("atof stub\n");
-  stub = 1;
-  return 0;
+  char const *p = string;
+  return abtod (&p, 0);
 }
diff --git a/lib/stdlib/atoi.c b/lib/stdlib/atoi.c
index 3f113723..6699fbea 100644
--- a/lib/stdlib/atoi.c
+++ b/lib/stdlib/atoi.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -21,8 +21,8 @@
 #include <mes/lib.h>
 
 int
-atoi (char const *s)
+atoi (char const *string)
 {
-  char const *p = s;
+  char const *p = string;
   return abtol (&p, 0);
 }