diff --git a/src/modules/controllib/module.mk b/src/modules/controllib/module.mk
index f0139a4b70..2860d1efce 100644
--- a/src/modules/controllib/module.mk
+++ b/src/modules/controllib/module.mk
@@ -39,3 +39,5 @@ SRCS		 = test_params.c \
 		   block/BlockParam.cpp \
 		   uorb/blocks.cpp \
 		   blocks.cpp
+
+MAXOPTIMIZATION = -Os