diff --git a/build-droid/build-all.sh b/build-droid/build-all.sh
index 7e7e9d7..9dfeca6 100755
--- a/build-droid/build-all.sh
+++ b/build-droid/build-all.sh
@@ -89,7 +89,11 @@ pushd $TMPDIR
 
 export ANDROID_API_LEVEL="14"
 export ARM_TARGET="armv7"
-export TOOLCHAIN_VERSION="4.7"
+
+if [ -z $TOOLCHAIN_VERSION ]
+then
+	export TOOLCHAIN_VERSION="4.7"
+fi
 
 # Platforms to build for (changing this may break the build)
 PLATFORMS="arm-linux-androideabi"