diff --git a/var/spack/repos/builtin/packages/r-rmarkdown/package.py b/var/spack/repos/builtin/packages/r-rmarkdown/package.py
index 13e5651dbc6ea2e2ba3e9255a584508df8a4c4a9..6258b03a6e34b1a178a3b003d4baccf69bfed767 100644
--- a/var/spack/repos/builtin/packages/r-rmarkdown/package.py
+++ b/var/spack/repos/builtin/packages/r-rmarkdown/package.py
@@ -26,4 +26,5 @@ class RRmarkdown(RPackage):
     depends_on('r-rprojroot', type=('build', 'run'))
     depends_on('r-mime', type=('build', 'run'))
     depends_on('r-stringr@1.2.0:', type=('build', 'run'))
+    depends_on('r-catools', type=('build', 'run'))
     depends_on('r@3.0:')