diff --git a/gstreamer.spec.in b/gstreamer.spec.in
index 4e4af4a616..986f77d4f7 100644
--- a/gstreamer.spec.in
+++ b/gstreamer.spec.in
@@ -18,6 +18,7 @@ Requires: 	libxml2 >= %_libxml2
 BuildRequires: 	glib2-devel >= %_glib2
 BuildRequires: 	libxml2 >= %_libxml2
 BuildRequires: 	nasm => 0.90
+BuildRequires: 	bison
 
 %description
 GStreamer is a streaming-media framework, based on graphs of filters which