diff --git a/services/incremental/IncrementalService.cpp b/services/incremental/IncrementalService.cpp
index 599ac93..9979557 100644
--- a/services/incremental/IncrementalService.cpp
+++ b/services/incremental/IncrementalService.cpp
@@ -481,6 +481,9 @@
         if (!mkdirOrLog(path::join(backing, ".index"), 0777)) {
             return kInvalidStorageId;
         }
+        if (!mkdirOrLog(path::join(backing, ".incomplete"), 0777)) {
+            return kInvalidStorageId;
+        }
         auto status = mVold->mountIncFs(backing, mountTarget, 0, &controlParcel);
         if (!status.isOk()) {
             LOG(ERROR) << "Vold::mountIncFs() failed: " << status.toString8();