diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index f87b0928e0..8e5e68073b 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -199,7 +199,7 @@ if (MSVC)
   configure_file(extract_includes.bat.in extract_includes.bat)
 
   # Suppress linker warnings about files with no symbols defined.
-  set(CMAKE_STATIC_LINKER_FLAGS /ignore:4221)
+  set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /ignore:4221")
 
   # Configure Resource Compiler
   enable_language(RC)