diff --git a/src/triggers/changerace.h b/src/triggers/changerace.h
index 1b08110b3..e6b19dcb0 100644
--- a/src/triggers/changerace.h
+++ b/src/triggers/changerace.h
@@ -26,6 +26,7 @@ extern "C" {
     struct trigger_type;
     struct trigger;
     struct unit;
+    struct race;
 
     extern struct trigger_type tt_changerace;