diff --git a/src/rust/protover/Cargo.toml b/src/rust/protover/Cargo.toml
index 279916bd25..3f70155ef8 100644
--- a/src/rust/protover/Cargo.toml
+++ b/src/rust/protover/Cargo.toml
@@ -3,6 +3,9 @@ authors = ["The Tor Project"]
 version = "0.0.1"
 name = "protover"
 
+[features]
+testing = ["tor_log/testing"]
+
 [dependencies]
 libc = "0.2.22"