diff --git a/bro.spec b/bro.spec
index d20c6d2..da164f0 100644
--- a/bro.spec
+++ b/bro.spec
@@ -64,6 +64,7 @@ BuildRequires:  openssl-devel
 BuildRequires:  python2-devel
 BuildRequires:  swig
 BuildRequires:  zlib-devel
+BuildRequires:  python2-sphinx
 
 %description -n bro-core
 Bro is a powerful network analysis framework that is much different from the