diff --git a/CMakeLists.txt b/CMakeLists.txt
index 721ebb30..f9a43019 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -395,6 +395,8 @@ endif()
 set(HOST_FILLORDER FILLORDER_MSB2LSB)
 if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "i.*86.*" OR
    CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "amd64.*" OR
+   # AMD64 on Windows
+   CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "AMD64" OR
    CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "x86_64.*")
   set(HOST_FILLORDER FILLORDER_LSB2MSB)
 endif()