diff --git a/var/spack/repos/builtin/packages/openslide/package.py b/var/spack/repos/builtin/packages/openslide/package.py
index d86af5a1aac..c41da2461be 100644
--- a/var/spack/repos/builtin/packages/openslide/package.py
+++ b/var/spack/repos/builtin/packages/openslide/package.py
@@ -19,3 +19,6 @@ class Openslide(AutotoolsPackage):
     depends_on('libtiff')
     depends_on('libxml2')
     depends_on('sqlite@3.6:')
+    depends_on('glib')
+    depends_on('cairo+pdf')
+    depends_on('gdk-pixbuf')