diff --git a/serde_macros/Cargo.toml b/serde_macros/Cargo.toml
index 6ed3af89..dc72e77b 100644
--- a/serde_macros/Cargo.toml
+++ b/serde_macros/Cargo.toml
@@ -22,6 +22,7 @@ serde_codegen = { version = "^0.7.10", path = "../serde_codegen", default-featur
 
 [dev-dependencies]
 compiletest_rs = "^0.1.1"
+fnv = "1.0"
 rustc-serialize = "^0.3.16"
 serde = { version = "^0.7.9", path = "../serde" }