diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index 5b478c2ed7..c2761207e3 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -2873,6 +2873,8 @@ (define-public r-nmf
     (build-system r-build-system)
     (propagated-inputs
      `(("r-cluster" ,r-cluster)
+       ("r-bigmemory" ,r-bigmemory)
+       ("r-synchronicity" ,r-synchronicity)
        ("r-colorspace" ,r-colorspace)
        ("r-digest" ,r-digest)
        ("r-doparallel" ,r-doparallel)