diff --git a/CMakeLists.txt b/CMakeLists.txt
index ef3fcd847d..945dac265c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,9 +96,6 @@ option(DISABLE_NETWORK "Disable multiplayer functionality. Mainly for testing.")
 option(DISABLE_TTF "Disable support for TTF provided by freetype2.")
 option(ENABLE_LIGHTFX "Enable lighting effects." ON)
 option(ENABLE_SCRIPTING "Enable script / plugin support." ON)
-if (MINGW)
-    option(MINGW_TARGET_NT5_1 "Use only NT5.1 APIs and libraries." OFF)
-endif ()
 
 option(DISABLE_GUI "Don't build GUI. (Headless only.)")
 
@@ -108,13 +105,6 @@ if (FORCE32)
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${TARGET_M}")
 endif ()
 
-if (MINGW_TARGET_NT5_1)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_WIN32_WINNT=0x501")
-	if (STATIC)
-	    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DCURL_STATICLIB=1 -DZIP_STATIC=1 -static")
-	endif ()
-endif ()
-
 if (PORTABLE OR WIN32)
     set(CMAKE_INSTALL_LIBDIR "${CMAKE_INSTALL_BINDIR}")
     set(CMAKE_INSTALL_RPATH "$ORIGIN")
diff --git a/src/openrct2/CMakeLists.txt b/src/openrct2/CMakeLists.txt
index b07a5e0c77..6a1a1f081a 100644
--- a/src/openrct2/CMakeLists.txt
+++ b/src/openrct2/CMakeLists.txt
@@ -45,7 +45,7 @@ if (NOT MINGW AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" AND NOT ${CMAKE_SYS
 endif()
 
 if (NOT DISABLE_NETWORK OR NOT DISABLE_HTTP)
-    if (WIN32 AND NOT MINGW_TARGET_NT5_1)
+    if (WIN32)
         target_link_libraries(${PROJECT_NAME} bcrypt)
     else ()
         if (APPLE AND NOT MACOS_USE_DEPENDENCIES)
@@ -71,7 +71,7 @@ if (NOT DISABLE_NETWORK AND WIN32)
 endif ()
 
 if (NOT DISABLE_HTTP)
-    if (WIN32 AND NOT MINGW_TARGET_NT5_1)
+    if (WIN32)
         target_link_libraries(${PROJECT_NAME} winhttp)
     else ()
         PKG_CHECK_MODULES(LIBCURL REQUIRED libcurl)