diff --git a/src/cargo/core/package_id_spec.rs b/src/cargo/core/package_id_spec.rs
index 533e69b345f9..850287882511 100644
--- a/src/cargo/core/package_id_spec.rs
+++ b/src/cargo/core/package_id_spec.rs
@@ -188,6 +188,10 @@ impl PackageIdSpec {
                 None => (String::from(path_name), None),
             }
         };
+        if name.is_empty() {
+            bail!("package ID specification must have a name: `{url}`");
+        }
+        validate_package_name(name.as_str(), "pkgid", "")?;
         Ok(PackageIdSpec {
             name,
             version,
@@ -711,8 +715,8 @@ mod tests {
         )
         .is_err());
         assert!(PackageIdSpec::parse("@1.2.3").is_err());
-        assert!(PackageIdSpec::parse("registry+https://github.com").is_ok());
-        assert!(PackageIdSpec::parse("https://crates.io/1foo#1.2.3").is_ok());
+        assert!(PackageIdSpec::parse("registry+https://github.com").is_err());
+        assert!(PackageIdSpec::parse("https://crates.io/1foo#1.2.3").is_err());
     }
 
     #[test]