diff --git a/src/collections.rs b/src/collections/mod.rs
similarity index 98%
rename from src/collections.rs
rename to src/collections/mod.rs
index 2269f2ebd4..af88e75445 100644
--- a/src/collections.rs
+++ b/src/collections/mod.rs
@@ -1,5 +1,7 @@
 use std::hash::BuildHasherDefault;
 
+pub mod str;
+
 pub use fxhash::FxHasher;
 
 #[inline(always)]
diff --git a/src/collections/str.rs b/src/collections/str.rs
new file mode 100644
index 0000000000..57542b099a
--- /dev/null
+++ b/src/collections/str.rs
@@ -0,0 +1,7 @@
+pub struct Str(pub str);
+
+impl<'a> Into<&'a str> for &'a Str {
+    fn into(self) -> &'a str {
+        &self.0
+    }
+}