diff --git a/which.spec b/which.spec
index 7cf0fc3..63de67d 100644
--- a/which.spec
+++ b/which.spec
@@ -10,6 +10,7 @@ Source2: which2.csh
 Url: http://www.xs4all.nl/~carlo17/which/
 Patch: which-2.19-afs.patch
 Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+BuildRequires: readline-devel
 Requires(preun): /sbin/install-info
 Requires(post): /sbin/install-info