diff --git a/README.md b/README.md
index e98b321..fdb6d2b 100644
--- a/README.md
+++ b/README.md
@@ -280,7 +280,13 @@ Overall, I would caution that if you really care about the very far tails of dis
 
 In fact, squiggle.c does have a few functions for algebraic manipulations of simple distributions at the end of squiggle.c. But these are pretty rudimentary, and I don't know whether I'll end up expanding or deleting them.
 
-### Results of running clang-tidy
+### Compiler warnings
+
+#### Harsh compilation
+
+By default, I've enabled -Warn-all, -Warn-extra. However, these produce warnings for unused variables, some of which can sometimes be inocuous. For now, I'm suppressing these using a clever UNUSED macro. If you don't like that approach, you could add -Wno-unused-variable to your makefile and remove the macro. 
+
+#### Results of running clang-tidy
 
 clang-tidy is a utility to detect common errors in C/C++. You can run it with: