diff --git a/cmake/modules/SwiftSupport.cmake b/cmake/modules/SwiftSupport.cmake
index 508bb62b2..21e455a7f 100644
--- a/cmake/modules/SwiftSupport.cmake
+++ b/cmake/modules/SwiftSupport.cmake
@@ -49,6 +49,8 @@ function(get_swift_host_arch result_var_name)
     set("${result_var_name}" "wasm32" PARENT_SCOPE)
   elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "wasm64")
     set("${result_var_name}" "wasm64" PARENT_SCOPE)
+  elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "riscv64")
+    set("${result_var_name}" "riscv64" PARENT_SCOPE)
   else()
     message(FATAL_ERROR "Unrecognized architecture on host system: ${CMAKE_SYSTEM_PROCESSOR}")
   endif()