diff --git a/src/feature/stats/rephist.c b/src/feature/stats/rephist.c
index 2588bb4c00..a2dbb0ff16 100644
--- a/src/feature/stats/rephist.c
+++ b/src/feature/stats/rephist.c
@@ -74,6 +74,7 @@
  * (The "rephist" name originally stood for "reputation and history". )
  **/
 
+#define REPHIST_PRIVATE
 #include "core/or/or.h"
 #include "core/or/circuitlist.h"
 #include "core/or/circuituse.h"
@@ -106,11 +107,6 @@
 static void bw_arrays_init(void);
 static void predicted_ports_alloc(void);
 
-typedef struct bw_array_t bw_array_t;
-STATIC uint64_t find_largest_max(bw_array_t *b);
-STATIC void commit_max(bw_array_t *b);
-STATIC void advance_obs(bw_array_t *b);
-
 /** Total number of bytes currently allocated in fields used by rephist.c. */
 uint64_t rephist_total_alloc=0;
 /** Number of or_history_t objects currently allocated. */
diff --git a/src/feature/stats/rephist.h b/src/feature/stats/rephist.h
index e17a722489..842184f815 100644
--- a/src/feature/stats/rephist.h
+++ b/src/feature/stats/rephist.h
@@ -109,8 +109,14 @@ extern uint32_t rephist_total_num;
 #ifdef TOR_UNIT_TESTS
 extern int onion_handshakes_requested[MAX_ONION_HANDSHAKE_TYPE+1];
 extern int onion_handshakes_assigned[MAX_ONION_HANDSHAKE_TYPE+1];
+extern struct bw_array_t *write_array;
+#endif
+
+#ifdef REPHIST_PRIVATE
 typedef struct bw_array_t bw_array_t;
-extern bw_array_t *write_array;
+STATIC uint64_t find_largest_max(bw_array_t *b);
+STATIC void commit_max(bw_array_t *b);
+STATIC void advance_obs(bw_array_t *b);
 #endif
 
 /**
@@ -139,4 +145,3 @@ void rep_hist_prep_published_padding_counts(time_t now);
 void rep_hist_padding_count_timers(uint64_t num_timers);
 
 #endif /* !defined(TOR_REPHIST_H) */
-
diff --git a/src/test/test_relay.c b/src/test/test_relay.c
index c3fd6578e1..4311392be8 100644
--- a/src/test/test_relay.c
+++ b/src/test/test_relay.c
@@ -1,14 +1,17 @@
 /* Copyright (c) 2014-2018, The Tor Project, Inc. */
 /* See LICENSE for licensing information */
 
-#include "core/or/or.h"
 #define CIRCUITBUILD_PRIVATE
+#define RELAY_PRIVATE
+#define REPHIST_PRIVATE
+#include "core/or/or.h"
 #include "core/or/circuitbuild.h"
 #include "core/or/circuitlist.h"
 #include "core/or/channeltls.h"
 #include "feature/stats/rephist.h"
-#define RELAY_PRIVATE
 #include "core/or/relay.h"
+#include "feature/stats/rephist.h"
+#include "lib/container/order.h"
 /* For init/free stuff */
 #include "core/or/scheduler.h"
 
@@ -22,9 +25,6 @@
 static or_circuit_t * new_fake_orcirc(channel_t *nchan, channel_t *pchan);
 
 static void test_relay_append_cell_to_circuit_queue(void *arg);
-uint64_t find_largest_max(bw_array_t *b);
-void commit_max(bw_array_t *b);
-void advance_obs(bw_array_t *b);
 
 static or_circuit_t *
 new_fake_orcirc(channel_t *nchan, channel_t *pchan)