diff --git a/android/scripts/cmake_android.cmd b/android/scripts/cmake_android.cmd
index 3d215560c0..40e839c533 100644
--- a/android/scripts/cmake_android.cmd
+++ b/android/scripts/cmake_android.cmd
@@ -1,7 +1,7 @@
 cd %~dp0\..
 
 ::rmdir /S /Q build
-mkdir build 2>null
+mkdir build 2>nul
 
 SET ANDROID_NDK=C:\apps\android-ndk-r5b
 SET CMAKE_EXE=C:\apps\cmake\bin\cmake.exe
diff --git a/android/scripts/cmake_android_armeabi.cmd b/android/scripts/cmake_android_armeabi.cmd
index d688a8aec0..9e2f263634 100644
--- a/android/scripts/cmake_android_armeabi.cmd
+++ b/android/scripts/cmake_android_armeabi.cmd
@@ -1,7 +1,7 @@
 cd %~dp0\..
 
 ::rmdir /S /Q build
-mkdir build 2>null
+mkdir build 2>nul
 
 SET ANDROID_NDK=C:\apps\android-ndk-r5b
 SET CMAKE_EXE=C:\apps\cmake\bin\cmake.exe
diff --git a/android/scripts/cmake_android_neon.cmd b/android/scripts/cmake_android_neon.cmd
index 08de453a7d..59746618c8 100644
--- a/android/scripts/cmake_android_neon.cmd
+++ b/android/scripts/cmake_android_neon.cmd
@@ -1,7 +1,7 @@
 cd %~dp0\..
 
 ::rmdir /S /Q build
-mkdir build 2>null
+mkdir build 2>nul
 
 SET ANDROID_NDK=C:\apps\android-ndk-r5b
 SET CMAKE_EXE=C:\apps\cmake\bin\cmake.exe