diff --git a/freeglut/freeglut/README.android b/freeglut/freeglut/README.android
index d3770bb..e42fbc5 100644
--- a/freeglut/freeglut/README.android
+++ b/freeglut/freeglut/README.android
@@ -88,6 +88,7 @@ Compile FreeGLUT for a traditional cross-compiler environment
 For instance if you use the autotools:
 
   PATH=/usr/src/ndk-standalone-9/bin:$PATH
+  PKG_CONFIG_PATH=/usr/src/ndk-standalone-9/share/pkgconfig
   ./configure --host=arm-linux-androideabi --prefix=/somewhere
   make
   make install
@@ -95,6 +96,8 @@ For instance if you use the autotools:
 If you use CMake, you may want to copy our Android toolchain
 'android_toolchain.cmake':
 
+  PATH=/usr/src/ndk-standalone-9/bin:$PATH
+  PKG_CONFIG_PATH=/usr/src/ndk-standalone-9/share/pkgconfig
   cp .../android_toolchain.cmake .
   cmake \
     -D CMAKE_TOOLCHAIN_FILE=android_toolchain.cmake