diff --git a/src/impls.rs b/src/impls.rs
index b6c68d0..17241e2 100644
--- a/src/impls.rs
+++ b/src/impls.rs
@@ -268,6 +268,13 @@ mod bstring {
         }
     }
 
+    impl<'a> From<&'a BString> for Cow<'a, BStr> {
+        #[inline]
+        fn from(s: &'a BString) -> Cow<'a, BStr> {
+            Cow::Borrowed(s.as_bstr())
+        }
+    }
+
     impl TryFrom<BString> for String {
         type Error = crate::FromUtf8Error;