diff --git a/src/lib/external_lgpl/module.mk b/src/lib/external_lgpl/module.mk
index 53f1629e39..29d3514f68 100644
--- a/src/lib/external_lgpl/module.mk
+++ b/src/lib/external_lgpl/module.mk
@@ -46,3 +46,5 @@
 #
 
 SRCS		 = 	tecs/tecs.cpp
+
+MAXOPTIMIZATION	 = -Os