--- old/src/hotspot/os/windows/os_windows.cpp	2018-03-01 14:53:54.116947287 -0500
+++ new/src/hotspot/os/windows/os_windows.cpp	2018-03-01 14:53:53.912936709 -0500
@@ -1518,7 +1518,7 @@
     result = _vsnprintf(buf, len, fmt, args);
     // If output (including NUL terminator) is truncated, the buffer
     // won't be NUL terminated.  Add the trailing NUL specified by C99.
-    if ((result < 0) || (result >= len)) {
+    if ((result < 0) || ((size_t)result >= len)) {
       buf[len - 1] = '\0';
     }
   }