diff --git a/token_bind_common.c b/token_bind_common.c
index 58db5f5..5a96de2 100644
--- a/token_bind_common.c
+++ b/token_bind_common.c
@@ -198,7 +198,7 @@ static void setNegotiatedVersion(SSL* ssl, uint8_t major_version,
 /* getNegotiatedVersion retrieves the negotiated major and minor version from
    |ssl|.  The major version number is written to out[0], and and the minor
    version number is written to out[1]. */
-static void getNegotiatedVersion(SSL* ssl, uint8_t* out) {
+void getNegotiatedVersion(SSL* ssl, uint8_t* out) {
   uintptr_t version =
       (uintptr_t)SSL_get_ex_data(ssl, ssl_ex_data_index_negotiated_version);
   out[0] = version;
diff --git a/token_bind_common.h b/token_bind_common.h
index 8e6e920..4b5bfb1 100644
--- a/token_bind_common.h
+++ b/token_bind_common.h
@@ -156,4 +156,9 @@ bool tbSetPadding(tbKeyType key_type, EVP_PKEY_CTX* key_ctx);
 void tbHashTokenBindingID(const uint8_t* tokbind_id, size_t tokbind_id_len,
                           uint8_t hash_out[TB_HASH_LEN]);
 
+/* getNegotiatedVersion retrieves the negotiated major and minor version from
+   |ssl|.  The major version number is written to out[0], and and the minor
+   version number is written to out[1]. */
+void getNegotiatedVersion(SSL* ssl, uint8_t* out);
+
 #endif  /* TOKEN_BIND_CSRC_TOKEN_BIND_COMMON_H_ */