diff --git a/INSTALL.txt b/INSTALL.txt
index 5b96efcad5..35be1bbb4e 100644
--- a/INSTALL.txt
+++ b/INSTALL.txt
@@ -57,7 +57,7 @@ On Unix (including Linux) and Mac OS X, `make' (or `make in-place')
 creates a build in the "racket" directory.
 
 On Windows with Microsoft Visual Studio (any version between 2008/9.0
-and 2013/12.0), `nmake win32-in-place' creates a build in the "racket"
+and 2015/14.0), `nmake win32-in-place' creates a build in the "racket"
 directory. For information on configuring your command-line
 environment for Visual Studio, see "racket/src/worksp/README".
 
diff --git a/racket/collects/compiler/private/xform.rkt b/racket/collects/compiler/private/xform.rkt
index 534fabb736..42b6988036 100644
--- a/racket/collects/compiler/private/xform.rkt
+++ b/racket/collects/compiler/private/xform.rkt
@@ -907,6 +907,7 @@
                __error __errno_location __toupper __tolower ___errno
                __attribute__ __mode__ ; not really functions in gcc
                __iob_func ; VC 8
+               __acrt_iob_func ; VC 14.0 (2015)
                |GetStdHandle| |__CFStringMakeConstantString|
                _vswprintf_c
                
diff --git a/racket/src/worksp/genvsx.c b/racket/src/worksp/genvsx.c
index f30dd79505..02b4d0acab 100644
--- a/racket/src/worksp/genvsx.c
+++ b/racket/src/worksp/genvsx.c
@@ -86,7 +86,10 @@ int main() {
   const char *vers = "100";
   int i;
 
-#if _MSC_VER >= 1800
+#if _MSC_VER >= 1900
+  /* VS 2015 */
+  vers = "140";
+#elif _MSC_VER >= 1800
   /* VS 2013 */
   vers = "120";
 #elif _MSC_VER >= 1700