diff --git a/Source/Core/Common/CMakeLists.txt b/Source/Core/Common/CMakeLists.txt
index 1177363ec3..8269290729 100644
--- a/Source/Core/Common/CMakeLists.txt
+++ b/Source/Core/Common/CMakeLists.txt
@@ -299,7 +299,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
   target_link_libraries(common PUBLIC dl rt)
 endif()
 
-if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
+if(WIN32)
   target_sources(common PRIVATE HRWrap.h HRWrap.cpp)
 endif()
 
diff --git a/Source/Core/VideoBackends/CMakeLists.txt b/Source/Core/VideoBackends/CMakeLists.txt
index 55b44f8c5d..9d20d6d2b5 100644
--- a/Source/Core/VideoBackends/CMakeLists.txt
+++ b/Source/Core/VideoBackends/CMakeLists.txt
@@ -2,7 +2,7 @@ add_subdirectory(OGL)
 add_subdirectory(Null)
 add_subdirectory(Software)
 
-if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
+if(WIN32)
   add_subdirectory(D3DCommon)
   add_subdirectory(D3D)
   add_subdirectory(D3D12)