diff --git a/runtime/tests/Makefile.inc b/runtime/tests/Makefile.inc
index c5b87ed..c2a879f 100644
--- a/runtime/tests/Makefile.inc
+++ b/runtime/tests/Makefile.inc
@@ -4,6 +4,7 @@ CC=clang # Source -> Native
 WASMCC=wasm32-unknown-unknown-wasm-clang # Source -> WebAssembly
 
 OPTFLAGS=-O3 -flto
+# OPTFLAGS=-O0 -flto -g
 MEMC_64=64bit_nix.c
 # MEMC_NO=no_protection.c
 # MEMC_GEN=generic.c