diff --git a/opendps/Makefile b/opendps/Makefile
index 44fd065e..dc69577f 100644
--- a/opendps/Makefile
+++ b/opendps/Makefile
@@ -53,7 +53,7 @@ CL_ENABLE ?= 1
 FUNCGEN_ENABLE ?= 1
 
 GIT_VERSION := $(shell git describe --abbrev=4 --dirty --always --tags)
-CFLAGS = -I. -DGIT_VERSION=\"$(GIT_VERSION)\" -Wno-missing-braces
+CFLAGS = -I. -DGIT_VERSION=\"$(GIT_VERSION)\" -Wno-missing-braces -O2
 
 # Output voltage and current limit are persisted in flash,
 # this is the default setting