diff --git a/src/buildtools/third_party/libc++abi/BUILD.gn b/src/buildtools/third_party/libc++abi/BUILD.gn
index 78c413535f..26c5875524 100644
--- a/src/buildtools/third_party/libc++abi/BUILD.gn
+++ b/src/buildtools/third_party/libc++abi/BUILD.gn
@@ -91,7 +91,7 @@ source_set("libc++abi") {
   # TODO(thakis): This is a gross workaround for https:/llvm.org/PR49313
   # We had to copy refstring.h into libc++abi for the relative path to work,
   # but the copy includes more stuff from libc++'s internal headers.
-  include_dirs = [ "../libc++/trunk/src/include" ]
+  include_dirs = [ "../libc++/trunk" ]
   if (!is_mac) {
     sources -= [
       "trunk/src/cxa_exception.cpp",
diff --git a/src/buildtools/third_party/libc++abi/trunk/src/stdlib_stdexcept.cpp b/src/buildtools/third_party/libc++abi/trunk/src/stdlib_stdexcept.cpp
index 4a464e4889..0f5efe491b 100644
--- a/src/buildtools/third_party/libc++abi/trunk/src/stdlib_stdexcept.cpp
+++ b/src/buildtools/third_party/libc++abi/trunk/src/stdlib_stdexcept.cpp
@@ -6,7 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "../../libcxx/src/include/refstring.h"
 #include "stdexcept"
 #include "new"
 #include <cstdlib>
@@ -14,6 +13,9 @@
 #include <cstdint>
 #include <cstddef>
 
+// This includes an implementation file from libc++.
+#include "src/include/refstring.h"
+
 static_assert(sizeof(std::__libcpp_refstring) == sizeof(const char *), "");
 
 namespace std  // purposefully not using versioning namespace