diff --git a/rust_snuba/src/processors/outcomes.rs b/rust_snuba/src/processors/outcomes.rs
index 2ff2b1983c1..538e3b57b80 100644
--- a/rust_snuba/src/processors/outcomes.rs
+++ b/rust_snuba/src/processors/outcomes.rs
@@ -35,6 +35,8 @@ const CLIENT_DISCARD_REASONS: &[&str] = &[
     "sample_rate",
     // an event was dropped because of an error when sending it (eg: 400 response)
     "send_error",
+    // an SDK internal buffer (eg. breadcrumbs buffer) overflowed
+    "buffer_overflow"
 ];
 
 pub fn process_message(