diff --git a/services/incremental/BinderIncrementalService.cpp b/services/incremental/BinderIncrementalService.cpp
index 9869b07..5e5be25 100644
--- a/services/incremental/BinderIncrementalService.cpp
+++ b/services/incremental/BinderIncrementalService.cpp
@@ -280,8 +280,8 @@
 }
 
 static FileId toFileId(const std::vector<uint8_t>& id) {
-    FileId fid;
-    memcpy(&fid, id.data(), id.size());
+    FileId fid = {};
+    memcpy(&fid, id.data(), std::min(sizeof(fid), id.size()));
     return fid;
 }