diff --git a/llvm/cmake/config-ix.cmake b/llvm/cmake/config-ix.cmake
index a16038f709893..6725cdda7d546 100644
--- a/llvm/cmake/config-ix.cmake
+++ b/llvm/cmake/config-ix.cmake
@@ -419,6 +419,8 @@ elseif (LLVM_NATIVE_ARCH MATCHES "riscv32")
   set(LLVM_NATIVE_ARCH RISCV)
 elseif (LLVM_NATIVE_ARCH MATCHES "riscv64")
   set(LLVM_NATIVE_ARCH RISCV)
+elseif (LLVM_NATIVE_ARCH MATCHES "z80")
+  set(LLVM_NATIVE_ARCH Z80)
 else ()
   message(FATAL_ERROR "Unknown architecture ${LLVM_NATIVE_ARCH}")
 endif ()