1 files changed, 2 insertions, 2 deletions
diff --git a/src/common/compat.c b/src/common/compat.c
index 26038c1099..0fb169b734 100644
--- a/src/common/compat.c
+++ b/src/common/compat.c
@@ -355,12 +355,12 @@ tor_vasprintf(char **strp, const char *fmt, va_list args)
   else
     *strp = strp_tmp;
   return r;
-#elif defined(MS_WINDOWS)
+#elif defined(_MSC_VER)
   /* On Windows, _vsnprintf won't tell us the length of the string if it
    * overflows, so we need to use _vcsprintf to tell how much to allocate */
   int len, r;
   char *res;
-  len = _vcsprintf(fmt, args);
+  len = _vscprintf(fmt, args);
   if (len < 0) {
     *strp = NULL;
     return -1;