diff --git a/app_template/Makefile b/app_template/Makefile
index 4d75058..e2fd82b 100644
--- a/app_template/Makefile
+++ b/app_template/Makefile
@@ -19,7 +19,7 @@ USED_MODULES =
 ifeq "$(CONFIG)" "Debug"
 XCC_FLAGS = -g -O0
 else
-XCC_FLAGS = -g -O3
+XCC_FLAGS = -g -O2
 endif
 
 # The VERBOSE variable, if set to 1, enables verbose output from the make