diff --git a/bti.spec b/bti.spec
index f6862bc..334df4a 100644
--- a/bti.spec
+++ b/bti.spec
@@ -13,6 +13,8 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 %if 0%{?el5}
 BuildRequires:  curl-devel readline-devel
+# This can be dropped once liboauth rev 2.1 lands
+BuildRequires:  nss-devel
 %else
 BuildRequires:  libcurl-devel compat-readline5-devel
 %endif