diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index bd2ac69c1455e..8220a9dbfd4db 100644
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -54,7 +54,7 @@ if(CLANG_BUILT_STANDALONE)
   option(LLVM_INSTALL_TOOLCHAIN_ONLY
     "Only include toolchain files in the 'install' target." OFF)
 
-  option(LLVM_FORCE_USE_OLD_HOST_TOOLCHAIN
+  option(LLVM_FORCE_USE_OLD_TOOLCHAIN
     "Set to ON to force using an old, unsupported host toolchain." OFF)
   option(CLANG_ENABLE_BOOTSTRAP "Generate the clang bootstrap target" OFF)
   option(LLVM_ENABLE_LIBXML2 "Use libxml2 if available." ON)
diff --git a/flang/CMakeLists.txt b/flang/CMakeLists.txt
index 66a09703c87d3..4c0b9a84cc5bf 100644
--- a/flang/CMakeLists.txt
+++ b/flang/CMakeLists.txt
@@ -125,7 +125,7 @@ if (FLANG_STANDALONE_BUILD)
 
   option(LLVM_INSTALL_TOOLCHAIN_ONLY
     "Only include toolchain files in the 'install' target." OFF)
-  option(LLVM_FORCE_USE_OLD_HOST_TOOLCHAIN
+  option(LLVM_FORCE_USE_OLD_TOOLCHAIN
     "Set to ON to force using an old, unsupported host toolchain." OFF)