diff --git a/cmake/CompileFlags.cmake b/cmake/CompileFlags.cmake
index 6fe185df85..4adc4a31a1 100644
--- a/cmake/CompileFlags.cmake
+++ b/cmake/CompileFlags.cmake
@@ -23,6 +23,9 @@ macro(compile_flags)
         # C++11 standard". We need C++11 for the way we use threads.
         add_compile_options(/Zc:rvalueCast)
 
+        # Enable multi-threaded compilation.
+        add_compile_options(/MP)
+
         # Add DPI manifest to project; other WIN32 targets get this via ottdres.rc
         list(APPEND GENERATED_SOURCE_FILES "${CMAKE_SOURCE_DIR}/os/windows/openttd.manifest")
     endif (MSVC)