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-rw-r--r--src/liballoc/string.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
index c1ef1c2f96c..02ecb65fa38 100644
--- a/src/liballoc/string.rs
+++ b/src/liballoc/string.rs
@@ -2008,7 +2008,7 @@ impl From<Box<str>> for String {
     }
 }
 
-#[stable(feature = "box_from_str", since = "1.18.0")]
+#[stable(feature = "box_from_str", since = "1.20.0")]
 impl From<String> for Box<str> {
     fn from(s: String) -> Box<str> {
         s.into_boxed_str()