diff --git a/osc.spec b/osc.spec
index 6550e82..d860d02 100644
--- a/osc.spec
+++ b/osc.spec
@@ -82,6 +82,7 @@ BuildRequires:  %{use_python_pkg}-urllib3
 BuildRequires:  diffstat
 # needed for git scm tests
 BuildRequires:  git-core
+BuildRequires:  zsh
 
 Requires:       %{use_python_pkg}-cryptography
 Requires:       %{use_python_pkg}-rpm