diff --git a/src/cargo/sources/registry/mod.rs b/src/cargo/sources/registry/mod.rs
index b53e88d58a8..ac29f25093e 100644
--- a/src/cargo/sources/registry/mod.rs
+++ b/src/cargo/sources/registry/mod.rs
@@ -887,7 +887,7 @@ impl<'cfg> Source for RegistrySource<'cfg> {
 
 impl RegistryConfig {
     /// File name of [`RegistryConfig`].
-    const NAME: &str = "config.json";
+    const NAME: &'static str = "config.json";
 }
 
 /// Get the maximum upack size that Cargo permits