diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5dd0b0815..881b4e21b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -221,6 +221,7 @@ endif()
 if (WIN32)
 	target_link_libraries(torrent-rasterbar wsock32 ws2_32)
 	add_definitions(-D_WIN32_WINNT=0x0500)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP") # multicore compilation
 endif()
 
 if (encryption)