diff --git a/src/drivers/mkblctrl/module.mk b/src/drivers/mkblctrl/module.mk
index 3ac263b002..6daa14aa53 100644
--- a/src/drivers/mkblctrl/module.mk
+++ b/src/drivers/mkblctrl/module.mk
@@ -37,6 +37,8 @@
 
 MODULE_COMMAND		= mkblctrl
 
-SRCS				= mkblctrl.cpp
+SRCS			= mkblctrl.cpp
 
 INCLUDE_DIRS		+= $(TOPDIR)/arch/arm/src/stm32 $(TOPDIR)/arch/arm/src/common
+
+MAXOPTIMIZATION	 = -Os