diff --git a/src/pam_radius_auth.c b/src/pam_radius_auth.c
index 09cd8d8..2549190 100644
--- a/src/pam_radius_auth.c
+++ b/src/pam_radius_auth.c
@@ -1274,7 +1274,8 @@ static int rad_converse(pam_handle_t *pamh, int msg_style, const char *message,
 	int retval;
 
 	resp_msg.msg_style = msg_style;
-	resp_msg.msg = message;
+	memcpy(&resp_msg.msg, message, sizeof(resp_msg.msg));
+
 	msg[0] = &resp_msg;
 
 	/* grab the password */