diff --git a/examples/upload.c b/examples/upload.c
index 908024f4..93c353d5 100644
--- a/examples/upload.c
+++ b/examples/upload.c
@@ -10,14 +10,9 @@
 #include <io.h>
 #define strtoll strtol
 typedef __int64 int64_t;
-#define O_CLOEXEC 0
-#define O_EXLOCK 0
 #else
 #include <inttypes.h>
 #include <unistd.h>
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
 #endif // !_WIN32
 
 #include "mongoose.h"
@@ -85,8 +80,13 @@ static void handle_file_upload(struct mg_connection *conn) {
     mg_printf(conn, "%s%s", HTTP_500, "Can't get file name");
   } else if (cl <= 0) {
     mg_printf(conn, "%s%s", HTTP_500, "Empty file");
-  } else if ((fd = open(path, O_CREAT | O_TRUNC | O_BINARY |
-                        O_WRONLY | O_EXLOCK | O_CLOEXEC)) < 0) {
+  } else if ((fd = open(path, O_CREAT | O_TRUNC |
+#ifdef _WIN32
+                        O_BINARY |
+#else
+                        O_EXLOCK | O_CLOEXEC |
+#endif
+                        O_WRONLY)) < 0) {
     // We're opening the file with exclusive lock held. This guarantee us that
     // there is no other thread can save into the same file simultaneously.
     mg_printf(conn, "%s%s", HTTP_500, "Cannot open file");