diff --git a/.cargo/config.toml b/.cargo/config.toml
index 4c64d1c8..bd0fa813 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,2 +1,3 @@
 [env]
 RUMA_UNSTABLE_EXHAUSTIVE_TYPES = "1"
+CXXFLAGS = "-include cstdint"