From a73c8e052dcb2931e6f6d5cc6606496ac6764bdb Mon Sep 17 00:00:00 2001
From: Mahdi Hosseini <seyed.mahdi.hosseini.moghaddam@ibm.com>
Date: Mon, 16 Nov 2020 17:13:53 -0500
Subject: [PATCH] Fix detecting file as directory on zOS issue #8051

---
 src/google/protobuf/compiler/importer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/google/protobuf/compiler/importer.cc b/src/google/protobuf/compiler/importer.cc
index 1ff8aadc6fe..c6a8d1eaf38 100644
--- a/src/google/protobuf/compiler/importer.cc
+++ b/src/google/protobuf/compiler/importer.cc
@@ -495,7 +495,7 @@ io::ZeroCopyInputStream* DiskSourceTree::OpenDiskFile(
   do {
     ret = stat(filename.c_str(), &sb);
   } while (ret != 0 && errno == EINTR);
-  if (ret == 0 && sb.st_mode & S_IFDIR) {
+  if (ret == 0 && S_ISDIR(sb.st_mode)) {
     last_error_message_ = "Input file is a directory.";
     return NULL;
   }