diff --git a/src/kernel/plane.h b/src/kernel/plane.h
index 7195e5f7c..d8ec176a9 100644
--- a/src/kernel/plane.h
+++ b/src/kernel/plane.h
@@ -23,6 +23,7 @@ extern "C" {
 #endif
 
     struct region;
+    struct faction;
     struct plane;
     struct storage;
 
diff --git a/src/kernel/save.test.c b/src/kernel/save.test.c
index 46369bd01..de7f28084 100644
--- a/src/kernel/save.test.c
+++ b/src/kernel/save.test.c
@@ -120,12 +120,11 @@ static void test_readwrite_dead_faction_group(CuTest *tc) {
 static void test_readwrite_dead_faction_regionowner(CuTest *tc) {
     faction *f;
     region *r;
-    unit * u;
 
     test_cleanup();
     config_set("rules.region_owners", "1");
     f = test_create_faction(0);
-    u = test_create_unit(f, r = test_create_region(0, 0, 0));
+    test_create_unit(f, r = test_create_region(0, 0, 0));
     region_set_owner(r, f, turn);
     destroyfaction(&factions);
     CuAssertTrue(tc, !f->_alive);