diff --git a/serde_test/Cargo.toml b/serde_test/Cargo.toml
index 5fd9ca9e..7808c997 100644
--- a/serde_test/Cargo.toml
+++ b/serde_test/Cargo.toml
@@ -10,7 +10,8 @@ repository = "https://github.com/serde-rs/serde"
 documentation = "https://docs.serde.rs/serde_test/"
 keywords = ["serde", "serialization"]
 readme = "crates-io.md"
-include = ["src/**/*.rs", "crates-io.md", "README.md", "LICENSE-APACHE", "LICENSE-MIT"]
+include = ["build.rs", "src/**/*.rs", "crates-io.md", "README.md", "LICENSE-APACHE", "LICENSE-MIT"]
+build = "build.rs"
 
 [dependencies]
 serde = { version = "1.0.60", path = "../serde" }