diff --git a/library/alloc/src/ffi/c_str.rs b/library/alloc/src/ffi/c_str.rs
index f99395c72aa03..fef8404055373 100644
--- a/library/alloc/src/ffi/c_str.rs
+++ b/library/alloc/src/ffi/c_str.rs
@@ -723,7 +723,7 @@ impl fmt::Debug for CString {
 }
 
 #[stable(feature = "cstring_into", since = "1.7.0")]
-impl From<CString> for Vec<u8> {
+impl From<CString> for Vec<u8, Global, DEFAULT_COOP_PREFERRED> {
     /// Converts a [`CString`] into a <code>[Vec]<[u8]></code>.
     ///
     /// The conversion consumes the [`CString`], and removes the terminating NUL byte.