diff --git a/crates/proc-macro-srv/Cargo.toml b/crates/proc-macro-srv/Cargo.toml
index ba17ea6f7b..9c4375559c 100644
--- a/crates/proc-macro-srv/Cargo.toml
+++ b/crates/proc-macro-srv/Cargo.toml
@@ -37,7 +37,7 @@ expect-test = "1.4.0"
 proc-macro-test.path = "./proc-macro-test"
 
 [features]
-sysroot-abi = []
+sysroot-abi = ["proc-macro-test/sysroot-abi"]
 in-rust-tree = ["mbe/in-rust-tree", "sysroot-abi"]
 
 [lints]