diff --git a/src/capwap/dtls_openssl.h b/src/capwap/dtls_openssl.h
index 35854d67..a950a11b 100644
--- a/src/capwap/dtls_openssl.h
+++ b/src/capwap/dtls_openssl.h
@@ -46,6 +46,7 @@ extern int dtls_openssl_bio_free(BIO *bio);
 extern const char * dtls_openssl_get_currnet_cipher();
 extern int dtls_openssl_log_error_queue(const char *txt);
 
+extern BIO_METHOD * dtls_openssl_bio_method();
 
 
 #endif