diff --git a/src/data/ellpack_page_raw_format.cu b/src/data/ellpack_page_raw_format.cu
index 8316368ba..62b29640c 100644
--- a/src/data/ellpack_page_raw_format.cu
+++ b/src/data/ellpack_page_raw_format.cu
@@ -36,6 +36,7 @@ class EllpackPageRawFormat : public SparsePageFormat<EllpackPage> {
     if (!fi->Read(&impl->base_rowid)) {
       return false;
     }
+    dh::DefaultStream().Sync();
     return true;
   }