diff --git a/src/drivers/sf0x/module.mk b/src/drivers/sf0x/module.mk
index dc93a90e78..dc2c66d567 100644
--- a/src/drivers/sf0x/module.mk
+++ b/src/drivers/sf0x/module.mk
@@ -38,3 +38,5 @@
 MODULE_COMMAND	= sf0x
 
 SRCS		= sf0x.cpp
+
+MAXOPTIMIZATION	 = -Os