diff --git a/artiq/firmware/ksupport/eh_artiq.rs b/artiq/firmware/ksupport/eh_artiq.rs
index 0d6113938..d69608e9d 100644
--- a/artiq/firmware/ksupport/eh_artiq.rs
+++ b/artiq/firmware/ksupport/eh_artiq.rs
@@ -334,7 +334,7 @@ extern fn stop_fn(_version: c_int,
 }
 
 // Must be kept in sync with preallocate_runtime_exception_names() in artiq/language/embedding_map.py
-static EXCEPTION_ID_LOOKUP: [(&str, u32); 10] = [
+static EXCEPTION_ID_LOOKUP: [(&str, u32); 11] = [
     ("RuntimeError", 0),
     ("RTIOUnderflow", 1),
     ("RTIOOverflow", 2),