3 files changed, 7 insertions, 10 deletions
diff --git a/src/nvim/os/os_defs.h b/src/nvim/os/os_defs.h
index 87f8d214bd..f81785675e 100644
--- a/src/nvim/os/os_defs.h
+++ b/src/nvim/os/os_defs.h
@@ -4,7 +4,6 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/param.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 
@@ -14,13 +13,6 @@
 # include "nvim/os/unix_defs.h"
 #endif
 
-/// File descriptor number used for standard IO streams
-enum {
-  OS_STDIN_FILENO = STDIN_FILENO,
-  OS_STDOUT_FILENO = STDOUT_FILENO,
-  OS_STDERR_FILENO = STDERR_FILENO,
-};
-
 #define BASENAMELEN (NAME_MAX - 5)
 
 // Use the system path length if it makes sense.
diff --git a/src/nvim/os/unix_defs.h b/src/nvim/os/unix_defs.h
index 5c9daca476..27e64f20cf 100644
--- a/src/nvim/os/unix_defs.h
+++ b/src/nvim/os/unix_defs.h
@@ -1,9 +1,10 @@
 #ifndef NVIM_OS_UNIX_DEFS_H
 #define NVIM_OS_UNIX_DEFS_H
 
-// Windows doesn't have unistd.h, so we include it here to avoid numerous
-// instances of `#ifdef WIN32'.
+// Windows doesn't have the following headers,
+// so we include them here to avoid numerous instances of `#ifdef WIN32'.
 #include <unistd.h>
+#include <sys/param.h>
 
 // POSIX.1-2008 says that NAME_MAX should be in here
 #include <limits.h>
diff --git a/src/nvim/os/win_defs.h b/src/nvim/os/win_defs.h
index 8fd2e51f8b..faee06304c 100644
--- a/src/nvim/os/win_defs.h
+++ b/src/nvim/os/win_defs.h
@@ -45,6 +45,9 @@
 # ifndef restrict
 #  define restrict __restrict
 # endif
+# ifndef STDIN_FILENO
+#  define STDIN_FILENO _fileno(stdin)
+# endif
 # ifndef STDOUT_FILENO
 #  define STDOUT_FILENO _fileno(stdout)
 # endif
@@ -60,6 +63,7 @@
 
 #ifdef _MSC_VER
 typedef SSIZE_T ssize_t;
+typedef int mode_t;
 #endif
 
 #ifndef SSIZE_MAX