diff --git a/dependencies/CMakeLists.txt b/dependencies/CMakeLists.txt
index 5c25e30262..61e00fdf1b 100644
--- a/dependencies/CMakeLists.txt
+++ b/dependencies/CMakeLists.txt
@@ -195,7 +195,7 @@ AddDependency(NAME       docopt
 
 set(SPDLOG_CXX_FLAGS "")
 if(MSVC)
-    set(SPDLOG_CXX_FLAGS "/D_SILENCE_STDEXT_ARR_ITERS_DEPRECATION_WARNING")
+    set(SPDLOG_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D_SILENCE_STDEXT_ARR_ITERS_DEPRECATION_WARNING")
 endif()
 
 AddDependency(NAME       spdlog