diff --git a/CMakeLists.txt b/CMakeLists.txt
index e3a0cc369..d95414d71 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,6 +42,10 @@ endif()
 
 option(BUILD_SHARED_LIBS "build shared libraries" ${BUILD_SHARED_LIBS_DEFAULT})
 
+if (WIN32)
+    add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
+endif()
+
 #
 # option list
 #
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ccb607e56..c2049df79 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,7 +1,5 @@
 # TODO: should not use this
 if (WIN32)
-    add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
-
     if (BUILD_SHARED_LIBS)
         set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
     endif()