diff --git a/content/dev/build/android/_index.en.md b/content/dev/build/android/_index.en.md
index ef77fbd..6f1ac75 100644
--- a/content/dev/build/android/_index.en.md
+++ b/content/dev/build/android/_index.en.md
@@ -22,6 +22,7 @@ unzip android-ndk-r22b-linux-x86_64.zip
 dart pub global activate ffigen 5.0.1
 # on Ubuntu 18, it is: sudo apt install libclang-9-dev
 sudo apt-get install libclang-dev
+sudo apt install gcc-multilib
 
 git clone https://github.com/rustdesk/rustdesk
 cd rustdesk