diff --git a/Project-Setup.md b/Project-Setup.md
index dca36e1..b08f5f1 100644
--- a/Project-Setup.md
+++ b/Project-Setup.md
@@ -7,6 +7,7 @@ There are two main ways this happens:
 1. Provide `compile_commands.json` at the project root
 2. Provide a [`.ccls` file](#ccls-file). It is a line-based text file describing compiler flags.
    Recursively listed source files (headers excluded) will be indexed.
+   Use an empty `.ccls` to get started (if you don't need specific -I, -D, etc).
 
 If neither exists, then when ccls starts it will not index anything: instead it
 will wait for LSP clients to open files and index only those files.