diff --git a/dummy/dummy.h b/dummy/dummy.h
index 30466a589..142f5622f 100644
--- a/dummy/dummy.h
+++ b/dummy/dummy.h
@@ -40,5 +40,6 @@
 extern const struct rig_caps dummy_caps;
 extern const struct rig_caps netrigctl_caps;
 extern const struct rig_caps flrig_caps;
+extern const struct rig_caps trxmanager_caps;
 
 #endif /* _DUMMY_H */