diff --git a/src/drivers/ll40ls/module.mk b/src/drivers/ll40ls/module.mk
index ab7d432690..fb627afeea 100644
--- a/src/drivers/ll40ls/module.mk
+++ b/src/drivers/ll40ls/module.mk
@@ -38,3 +38,5 @@
 MODULE_COMMAND	= ll40ls
 
 SRCS		= ll40ls.cpp
+
+MAXOPTIMIZATION	 = -Os