diff --git a/lib/smol_str/src/lib.rs b/lib/smol_str/src/lib.rs
index 91dc6252cc..f09d0010c4 100644
--- a/lib/smol_str/src/lib.rs
+++ b/lib/smol_str/src/lib.rs
@@ -334,6 +334,13 @@ impl From<Box<str>> for SmolStr {
     }
 }
 
+impl From<Arc<str>> for SmolStr {
+    #[inline]
+    fn from(s: Arc<str>) -> SmolStr {
+        SmolStr(Repr::Heap(s))
+    }
+}
+
 impl<'a> From<Cow<'a, str>> for SmolStr {
     #[inline]
     fn from(s: Cow<'a, str>) -> SmolStr {
@@ -341,6 +348,16 @@ impl<'a> From<Cow<'a, str>> for SmolStr {
     }
 }
 
+impl From<SmolStr> for Arc<str> {
+    #[inline(always)]
+    fn from(text: SmolStr) -> Self {
+        match text.0 {
+            Repr::Heap(data) => data,
+            _ => text.as_str().into(),
+        }
+    }
+}
+
 impl From<SmolStr> for String {
     #[inline(always)]
     fn from(text: SmolStr) -> Self {
diff --git a/lib/smol_str/tests/test.rs b/lib/smol_str/tests/test.rs
index 187b39f001..1fbe7d667d 100644
--- a/lib/smol_str/tests/test.rs
+++ b/lib/smol_str/tests/test.rs
@@ -1,3 +1,5 @@
+use std::sync::Arc;
+
 use proptest::{prop_assert, prop_assert_eq, proptest};
 
 use smol_str::SmolStr;
@@ -21,7 +23,11 @@ fn assert_traits() {
 fn conversions() {
     let s: SmolStr = "Hello, World!".into();
     let s: String = s.into();
-    assert_eq!(s, "Hello, World!")
+    assert_eq!(s, "Hello, World!");
+
+    let s: SmolStr = Arc::<str>::from("Hello, World!").into();
+    let s: Arc<str> = s.into();
+    assert_eq!(s.as_ref(), "Hello, World!");
 }
 
 #[test]