diff --git a/msitools.spec b/msitools.spec
index bbffa33..e7652fd 100644
--- a/msitools.spec
+++ b/msitools.spec
@@ -18,6 +18,7 @@ BuildRequires:  libgcab1-devel >= 0.2
 BuildRequires:  libgsf-devel
 BuildRequires:  libuuid-devel
 BuildRequires:  vala
+BuildRequires:  bison
 
 %description
 msitools is a collection of utilities to inspect and create Windows