diff --git a/build.rs b/build.rs
index c6cb3a7009..f7eded9def 100644
--- a/build.rs
+++ b/build.rs
@@ -418,7 +418,7 @@ fn build_c_code(target: &Target, pregenerated: PathBuf, out_dir: &Path) {
 
     // XXX: Ideally, ring-test would only be built for `cargo test`, but Cargo
     // can't do that yet.
-    libs.into_iter()
+    libs.iter()
         .for_each(|&(lib_name, srcs, additional_srcs)| {
             build_library(
                 &target,