diff --git a/Makefile b/Makefile
index f1b0b6d..65a2522 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ STRIP ?= strip
 PKG_CONFIG ?= pkg-config
 PREFIX ?= /usr/local
 VERSION := $(shell if [ -d .git ] && which git 2>&1 > /dev/null; then git describe --always | tail -c +2; else echo $$STANDALONE_VERSION; fi)
-CFLAGS += -Wall -g -DNMRPFLASH_VERSION=\"$(VERSION)\" -O2
+CFLAGS += -Wall -g -DNMRPFLASH_VERSION=\"$(VERSION)\"
 SUFFIX ?=
 MACOS_SDK ?= macosx11.1