diff --git a/net/cgi-io/src/CMakeLists.txt b/net/cgi-io/src/CMakeLists.txt
index 56d9fa7f1..c7c9d40ca 100644
--- a/net/cgi-io/src/CMakeLists.txt
+++ b/net/cgi-io/src/CMakeLists.txt
@@ -9,7 +9,8 @@ FIND_LIBRARY(ubox NAMES ubox)
 FIND_LIBRARY(ubus NAMES ubus)
 INCLUDE_DIRECTORIES(${ubus_include_dir})
 
-ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -g3 -Wmissing-declarations)
+ADD_DEFINITIONS(-Os -Wall -Werror -Wextra --std=gnu99 -g3)
+ADD_DEFINITIONS(-Wno-unused-parameter -Wmissing-declarations)
 
 SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")