diff --git a/Building-for-Linux.md b/Building-for-Linux.md
index 65c3ec7..198fb18 100644
--- a/Building-for-Linux.md
+++ b/Building-for-Linux.md
@@ -24,6 +24,7 @@ You can reinstall them after Dolphin builds successfully if you like.
 2. `cd` into that directory
 3. `git clone https://github.com/dolphin-emu/dolphin .`
 4. Wait for the checkout to finish
+5. `git submodule init --update Externals/mGBA` (as of July 2021, Dolphin integrates mGBA, this step is needed to pull it into the build)
 
 ## Building
 ### Global Build