diff --git a/Getting-started.md b/Getting-started.md
index 8d22bce..94471c6 100644
--- a/Getting-started.md
+++ b/Getting-started.md
@@ -31,6 +31,8 @@ Additional notes: If your `libstdc++` is too old (no C++17 header files) or have
 * Linux with newer libstdc++ and clang>=6: `cmake -H. -BRelease -DUSE_SHARED_LLVM=on`
 * Linux with `gcc < 7` but `clang >= 5`, `cmake -H. -BRelease -DCMAKE_CXX_COMPILER=clang++`
 
+Debian: `apt install zlib1g-dev`
+
 `-DUSE_SHARED_LLVM=on` (optional) makes linked executable smaller.
 
 ### Setup your editor