diff --git a/cmake/options.cmake b/cmake/options.cmake
index 9e51db4d..a7b4ef8b 100644
--- a/cmake/options.cmake
+++ b/cmake/options.cmake
@@ -72,5 +72,5 @@ option (WITH_DEFAULT_LOGGER "Build with default logger" ON)
 
 option (WITH_DOC "Build with documentation" ON)
 
-set (GLOBAL PROPERTY "PROJECT_EC_FLAGS" "-Wall -Werror -Wextra" CACHE STRING "")
+set_property (GLOBAL PROPERTY "PROJECT_EC_FLAGS" -Wall -Werror -Wextra)
 # vim: expandtab:ts=2:sw=2:smartindent