diff --git a/repos/os/src/server/nic_router/target.mk b/repos/os/src/server/nic_router/target.mk
index 3c41f52089..acb1281def 100644
--- a/repos/os/src/server/nic_router/target.mk
+++ b/repos/os/src/server/nic_router/target.mk
@@ -30,6 +30,8 @@ SRC_CC += \
 
 INC_DIR += $(PRG_DIR)
 
+CC_OLEVEL = -O3
+
 CONFIG_XSD = config.xsd
 
 CC_CXX_WARN_STRICT_CONVERSION =