diff --git a/src/modules/systemlib/module.mk b/src/modules/systemlib/module.mk
index 147903aa03..5c4f2ec419 100644
--- a/src/modules/systemlib/module.mk
+++ b/src/modules/systemlib/module.mk
@@ -55,3 +55,4 @@ SRCS		 = err.c \
 		   pwm_limit/pwm_limit.c \
 		   circuit_breaker.c
 
+MAXOPTIMIZATION	 = -Os