diff --git a/Makefile b/Makefile
index 9bf2ec4..e5671ba 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,7 @@ TESTS = $(wildcard test/sql/*.sql)
 REGRESS = $(patsubst test/sql/%.sql,%,$(TESTS))
 REGRESS_OPTS = --inputdir=test --load-extension=$(EXTENSION)
 
+# To compile for portability, run: make OPTFLAGS=""
 OPTFLAGS = -march=native
 
 # Mac ARM doesn't always support -march=native