diff --git a/Lib/test/test_fileio.py b/Lib/test/test_fileio.py
index 930b654..2760b73 100644
--- a/Lib/test/test_fileio.py
+++ b/Lib/test/test_fileio.py
@@ -312,6 +312,9 @@
     def testInvalidFd(self):
         self.assertRaises(ValueError, _FileIO, -10)
         self.assertRaises(OSError, _FileIO, make_bad_fd())
+        if sys.platform == 'win32':
+            import msvcrt
+            self.assertRaises(IOError, msvcrt.get_osfhandle, make_bad_fd())
 
     def testBadModeArgument(self):
         # verify that we get a sensible error message for bad mode argument
diff --git a/Misc/NEWS b/Misc/NEWS
index 8ac6168..b205fa5 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -228,6 +228,9 @@
 Extension Modules
 -----------------
 
+- Issue #8734: Avoid crash in msvcrt.get_osfhandle() when an invalid file
+  descriptor is provided.  Patch by Pascal Chambon.
+
 - Issue #7736: Release the GIL around calls to opendir() and closedir()
   in the posix module.  Patch by Marcin Bachry.
 
diff --git a/PC/msvcrtmodule.c b/PC/msvcrtmodule.c
index 68b7d24..057900d 100755
--- a/PC/msvcrtmodule.c
+++ b/PC/msvcrtmodule.c
@@ -141,6 +141,9 @@
     if (!PyArg_ParseTuple(args,"i:get_osfhandle", &fd))
         return NULL;
 
+    if (!_PyVerify_fd(fd))
+        return PyErr_SetFromErrno(PyExc_IOError);
+
     handle = _get_osfhandle(fd);
     if (handle == -1)
         return PyErr_SetFromErrno(PyExc_IOError);