diff --git a/source/third_party/jsonspirit/json_spirit_value.h b/source/third_party/jsonspirit/json_spirit_value.h
index 8692cd2e3d..c26fa5d320 100644
--- a/source/third_party/jsonspirit/json_spirit_value.h
+++ b/source/third_party/jsonspirit/json_spirit_value.h
@@ -8,6 +8,7 @@
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
+# pragma warning(disable: 4505) // Unreferenced function has been removed.
 #endif
 
 #include <vector>
@@ -23,9 +24,9 @@
 
 // comment out the value types you don't need to reduce build times and intermediate file sizes
 #define JSON_SPIRIT_VALUE_ENABLED
-#define JSON_SPIRIT_WVALUE_ENABLED
-#define JSON_SPIRIT_MVALUE_ENABLED
-#define JSON_SPIRIT_WMVALUE_ENABLED
+//#define JSON_SPIRIT_WVALUE_ENABLED
+//#define JSON_SPIRIT_MVALUE_ENABLED
+//#define JSON_SPIRIT_WMVALUE_ENABLED
 
 namespace json_spirit
 {