diff --git a/glib2.spec b/glib2.spec
index 19488e5..4be0f36 100644
--- a/glib2.spec
+++ b/glib2.spec
@@ -19,6 +19,7 @@ BuildRequires: libselinux-devel
 # for sys/inotify.h
 BuildRequires: glibc-devel
 BuildRequires: automake autoconf libtool
+BuildRequires: gtk-doc
 
 Patch0: pyloc.patch