diff --git a/libc/CMakeLists.txt b/libc/CMakeLists.txt
--- a/libc/CMakeLists.txt
+++ b/libc/CMakeLists.txt
@@ -77,6 +77,9 @@
   if (NOT "compiler-rt" IN_LIST LLVM_ENABLE_PROJECTS)
     message(FATAL_ERROR "SCUDO cannot be included without adding compiler-rt to LLVM_ENABLE_PROJECTS")
   endif()
+  if(NOT DEFINED COMPILER_RT_BUILD_GWP_ASAN)
+    set(COMPILER_RT_BUILD_GWP_ASAN ON)
+  endif()
 endif()
 
 include(CMakeParseArguments)