diff --git a/sdk/cmake/msvc.cmake b/sdk/cmake/msvc.cmake
index 5645f83dc31..77de6955619 100644
--- a/sdk/cmake/msvc.cmake
+++ b/sdk/cmake/msvc.cmake
@@ -363,7 +363,6 @@ if(ARCH STREQUAL "amd64")
     add_definitions(/D__x86_64)
     set(SPEC2DEF_ARCH x86_64)
 elseif(ARCH STREQUAL "arm")
-    add_definitions(/D__arm__)
     set(SPEC2DEF_ARCH arm)
 elseif(ARCH STREQUAL "arm64")
     add_definitions(/D__arm64__)