diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8906fed..e953b76 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,8 +11,11 @@ if(MSVC)
   set(redwg libredwg)
   # Disable some overly strict MSVC warnings.
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -wd4244 -wd4800 -wd4805 -wd4101 -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS")
-else()
+  else()
   set(redwg redwg)
+  endif()
+if(MSVC AND CMAKE_SYSTEM_PROCESSOR STREQUAL "ARM64")
+  add_compile_options(/Gy)
 endif()
 
 if (EXISTS ".version")