diff --git a/unixODBC.spec b/unixODBC.spec
index 042653e..92f95c1 100644
--- a/unixODBC.spec
+++ b/unixODBC.spec
@@ -19,7 +19,7 @@
 
 
 Name:           unixODBC
-BuildRequires:  gcc-c++ libtool
+BuildRequires:  bison gcc-c++ libtool
 Version:        2.3.1
 Release:        0
 Summary:        ODBC driver manager with some drivers included