diff --git a/tools/cpp/CROSSTOOL b/tools/cpp/CROSSTOOL
index 39f29d8..20f47e3 100644
--- a/tools/cpp/CROSSTOOL
+++ b/tools/cpp/CROSSTOOL
@@ -932,6 +932,8 @@
   compiler_flag: "external/linaro_linux_gcc_repo/include/c++/7.4.1"
   compiler_flag: "-isystem"
   compiler_flag: "external/linaro_linux_gcc_repo/arm-linux-gnueabihf/libc/usr/include"
+  compiler_flag: "-isystem"
+  compiler_flag: "external/org_frc971/third_party"
   compiler_flag: "-D__STDC_FORMAT_MACROS"
   compiler_flag: "-D__STDC_CONSTANT_MACROS"
   compiler_flag: "-D__STDC_LIMIT_MACROS"