diff --git a/profiles/calculate/package.keywords/defaults b/profiles/calculate/package.keywords/defaults
index 208ed3cc6..337aadc0a 100644
--- a/profiles/calculate/package.keywords/defaults
+++ b/profiles/calculate/package.keywords/defaults
@@ -61,3 +61,5 @@
 # need for calculate utilities
 ~dev-python/pyinotify-0.9.4 amd64 x86
 ~dev-python/setuptools-0.6.32 amd64 x86
+
+~dev-lang/tk-8.5.13 amd64 x86