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-rw-r--r--openssl/src/string.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/openssl/src/string.rs b/openssl/src/string.rs
index 0324d577..af58130e 100644
--- a/openssl/src/string.rs
+++ b/openssl/src/string.rs
@@ -8,7 +8,7 @@ use std::str;
use stack::Stackable;
-foreign_type! {
+foreign_type_and_impl_send_sync! {
type CType = c_char;
fn drop = free;