diff --git a/demos/ARMCM0-LPC1114-GCC/Makefile b/demos/ARMCM0-LPC1114-GCC/Makefile
index 0722b8604..e776ab4c5 100644
--- a/demos/ARMCM0-LPC1114-GCC/Makefile
+++ b/demos/ARMCM0-LPC1114-GCC/Makefile
@@ -5,7 +5,7 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O0 -ggdb -fomit-frame-pointer -mabi=apcs-gnu
+  USE_OPT = -O2 -ggdb -fomit-frame-pointer -mabi=apcs-gnu
 endif
 
 # C++ specific options here (added to USE_OPT).