diff --git a/Checkpoint.h b/Checkpoint.h
index c1fb2b7..6f3acac 100644
--- a/Checkpoint.h
+++ b/Checkpoint.h
@@ -39,6 +39,8 @@
 
 bool cp_needsCheckpoint();
 
+bool cp_isCheckpointing();
+
 android::binder::Status cp_prepareCheckpoint();
 
 android::binder::Status cp_restoreCheckpoint(const std::string& mountPoint, int count = 0);