diff --git a/generator.h b/generator.h
index 3dadd63..c549d89 100644
--- a/generator.h
+++ b/generator.h
@@ -9,6 +9,8 @@ struct G_state;
 /* initializes generator */
 G_state *initialize_generator();
 
+std::string do_crypto(long k, long c);
+
 G_state generate_blocks(G_state G, int k_blocks);
 
 /* returns output of 0 <= n <= 2^20 bytes */