diff --git a/libc/CMakeLists.txt b/libc/CMakeLists.txt
--- a/libc/CMakeLists.txt
+++ b/libc/CMakeLists.txt
@@ -164,8 +164,8 @@
 
 option(LLVM_LIBC_INCLUDE_SCUDO "Include the SCUDO standalone as the allocator for LLVM libc" OFF)
 if(LLVM_LIBC_INCLUDE_SCUDO)
-  if (NOT "compiler-rt" IN_LIST LLVM_ENABLE_PROJECTS)
-    message(FATAL_ERROR "SCUDO cannot be included without adding compiler-rt to LLVM_ENABLE_PROJECTS")
+  if (NOT ("compiler-rt" IN_LIST LLVM_ENABLE_PROJECTS OR "compiler-rt" IN_LIST LLVM_ENABLE_RUNTIMES))
+    message(FATAL_ERROR "SCUDO cannot be included without adding compiler-rt to LLVM_ENABLE_PROJECTS or LLVM_ENABLE_RUNTIMES")
   endif()
 endif()