diff --git a/include/libssh2.h b/include/libssh2.h
index 0b610fa..f5d7bf2 100644
--- a/include/libssh2.h
+++ b/include/libssh2.h
@@ -121,7 +121,7 @@ typedef struct _LIBSSH2_USERAUTH_KBDINT_RESPONSE
 } LIBSSH2_USERAUTH_KBDINT_RESPONSE;
 
 /* 'keyboard-interactive' authentication callback */
-#define LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(name_) void name_(const char* name, int name_len, const char* instruction, int instruction_len, int num_prompts, const LIBSSH2_USERAUTH_KBDINT_PROMPT* prompts, LIBSSH2_USERAUTH_KBDINT_RESPONSE* responses)
+#define LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(name_) void name_(const char* name, int name_len, const char* instruction, int instruction_len, int num_prompts, const LIBSSH2_USERAUTH_KBDINT_PROMPT* prompts, LIBSSH2_USERAUTH_KBDINT_RESPONSE* responses, void **abstract)
 
 /* Callbacks for special SSH packets */
 #define LIBSSH2_IGNORE_FUNC(name)					void name(LIBSSH2_SESSION *session, const char *message, int message_len, void **abstract)
diff --git a/src/userauth.c b/src/userauth.c
index a6e8925..414db1e 100644
--- a/src/userauth.c
+++ b/src/userauth.c
@@ -785,7 +785,7 @@ LIBSSH2_API int libssh2_userauth_keyboard_interactive_ex(LIBSSH2_SESSION *sessio
 			prompts[i].echo = *s++;
 		}
 
-		response_callback(auth_name, auth_name_len,  auth_instruction, auth_instruction_len, num_prompts, prompts, responses);
+		response_callback(auth_name, auth_name_len,  auth_instruction, auth_instruction_len, num_prompts, prompts, responses, &session->abstract);
 
 		packet_len = 1 /* byte      SSH_MSG_USERAUTH_INFO_RESPONSE */
 			+ 4        /* int       num-responses */