diff --git a/adb/adb_auth_host.c b/adb/adb_auth_host.c
index c72fe42..e53f059 100644
--- a/adb/adb_auth_host.c
+++ b/adb/adb_auth_host.c
@@ -15,9 +15,12 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #ifdef _WIN32
-#  define WIN32_LEAN_AND_MEAN
+#  ifndef WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
+#  endif
 #  include "windows.h"
 #  include "shlobj.h"
 #else
diff --git a/adb/sysdeps_win32.c b/adb/sysdeps_win32.c
index b082c6d..e69ec2b 100644
--- a/adb/sysdeps_win32.c
+++ b/adb/sysdeps_win32.c
@@ -2,6 +2,7 @@
 #include <winsock2.h>
 #include <windows.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <errno.h>
 #define  TRACE_TAG  TRACE_SYSDEPS
 #include "adb.h"
diff --git a/adb/usb_vendors.c b/adb/usb_vendors.c
index b037268..b6e43d5 100755
--- a/adb/usb_vendors.c
+++ b/adb/usb_vendors.c
@@ -17,9 +17,12 @@
 #include "usb_vendors.h"
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #ifdef _WIN32
-#  define WIN32_LEAN_AND_MEAN
+#  ifndef WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
+#  endif
 #  include "windows.h"
 #  include "shlobj.h"
 #else
diff --git a/adb/usb_windows.c b/adb/usb_windows.c
index b7ad913..a2d7226 100644
--- a/adb/usb_windows.c
+++ b/adb/usb_windows.c
@@ -21,6 +21,7 @@
 #include <usb100.h>
 #include <adb_api.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "sysdeps.h"