diff --git a/src/modules/mavlink/module.mk b/src/modules/mavlink/module.mk
index 515fbfadce..c44354ff04 100644
--- a/src/modules/mavlink/module.mk
+++ b/src/modules/mavlink/module.mk
@@ -46,3 +46,5 @@ SRCS		 += mavlink_main.cpp \
 			mavlink_commands.cpp
 
 INCLUDE_DIRS	 += $(MAVLINK_SRC)/include/mavlink
+
+MAXOPTIMIZATION		 = -Os