diff --git a/Building-for-Linux.md b/Building-for-Linux.md
index 154a545..a0ec6b4 100644
--- a/Building-for-Linux.md
+++ b/Building-for-Linux.md
@@ -53,6 +53,7 @@ Externals/fmt \
 Externals/lz4 \
 Externals/xxhash \
 Externals/enet \
+Externals/SDL \
 && git pull --recurse-submodules
 ```