2 files changed, 2 insertions, 2 deletions
diff --git a/library/std/src/sys/os_str/bytes.rs b/library/std/src/sys/os_str/bytes.rs
index 4a8808c9230..f8ab4543a3a 100644
--- a/library/std/src/sys/os_str/bytes.rs
+++ b/library/std/src/sys/os_str/bytes.rs
@@ -115,7 +115,7 @@ impl Buf {
     }
 
     #[inline]
-    pub fn from_string(s: String) -> Buf {
+    pub const fn from_string(s: String) -> Buf {
         Buf { inner: s.into_bytes() }
     }
 
diff --git a/library/std/src/sys/os_str/wtf8.rs b/library/std/src/sys/os_str/wtf8.rs
index 892bd2e3de6..bbc704ebf86 100644
--- a/library/std/src/sys/os_str/wtf8.rs
+++ b/library/std/src/sys/os_str/wtf8.rs
@@ -92,7 +92,7 @@ impl Buf {
     }
 
     #[inline]
-    pub fn from_string(s: String) -> Buf {
+    pub const fn from_string(s: String) -> Buf {
         Buf { inner: Wtf8Buf::from_string(s) }
     }