diff --git a/cmake/modules/AddSwift.cmake b/cmake/modules/AddSwift.cmake
index 289716edfd496..078ada591e962 100644
--- a/cmake/modules/AddSwift.cmake
+++ b/cmake/modules/AddSwift.cmake
@@ -58,6 +58,8 @@ function(_compute_lto_flag option out_var)
     set(${out_var} "-flto=full" PARENT_SCOPE)
   elseif (lowercase_option STREQUAL "thin")
     set(${out_var} "-flto=thin" PARENT_SCOPE)
+  else()
+    set(${out_var} "-fno-lto" PARENT_SCOPE)
   endif()
 endfunction()