diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 6001928f9..015a239b5 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -596,6 +596,7 @@ set(LLVM_ALL_EXPERIMENTAL_TARGETS
   CSKY
   DirectX
   M68k
+  W65816
   Xtensa
 )
 
