diff --git a/server/incoming_spa.c b/server/incoming_spa.c
index 254990eb..6ec08a16 100644
--- a/server/incoming_spa.c
+++ b/server/incoming_spa.c
@@ -122,7 +122,7 @@ get_raw_digest(char **digest, char *pkt_data)
     /* initialize an FKO context with no decryption key just so
      * we can get the outer message digest
     */
-    res = fko_new_with_data(&ctx, (char *)pkt_data, NULL);
+    res = fko_new_with_data(&ctx, (char *)pkt_data, NULL, FKO_DEFAULT_ENC_MODE);
     if(res != FKO_SUCCESS)
     {
         log_msg(LOG_WARNING, "Error initializing FKO context from SPA data: %s",