diff --git a/include/zmq_utils.h b/include/zmq_utils.h
index a40df7e2..4fe8fcd2 100644
--- a/include/zmq_utils.h
+++ b/include/zmq_utils.h
@@ -82,6 +82,12 @@ ZMQ_EXPORT void *zmq_threadstart (zmq_thread_fn* func, void* arg);
 /* Wait for thread to complete then free up resources.                        */
 ZMQ_EXPORT void zmq_threadclose (void* thread);
 
+/* Encode data with Z85 encoding. Returns encoded data                        */
+ZMQ_EXPORT char *zmq_z85_encode (char *dest, uint8_t *data, size_t size);
+
+/* Decode data with Z85 encoding. Returns decoded data                        */
+ZMQ_EXPORT uint8_t *zmq_z85_decode (uint8_t *dest, char *string);
+
 #undef ZMQ_EXPORT
 
 #ifdef __cplusplus
diff --git a/tools/curve_keygen.c b/tools/curve_keygen.c
index c18c4621..eb1f0bbb 100644
--- a/tools/curve_keygen.c
+++ b/tools/curve_keygen.c
@@ -25,6 +25,7 @@
 */
 
 #include <assert.h>
+#include <platform.hpp>
 #include <zmq_utils.h>
 #ifdef HAVE_LIBSODIUM
 #   include <sodium.h>