diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index f4ec094f1ba3..17ef03aaf9ac 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -253,6 +253,8 @@ option(LLVM_INCLUDE_TOOLS "Generate build targets for the LLVM tools." ON)
 option(LLVM_BUILD_TOOLS
   "Build the LLVM tools. If OFF, just generate build targets." ON)
 
+option(LLVM_BUILD_RUNTIME
+  "Build the LLVM runtime libraries." ON)
 option(LLVM_BUILD_EXAMPLES
   "Build the LLVM example programs. If OFF, just generate build targets." OFF)
 option(LLVM_INCLUDE_EXAMPLES "Generate build targets for the LLVM examples" ON)