diff --git a/libnotify.spec b/libnotify.spec
index 557cef3..621c739 100644
--- a/libnotify.spec
+++ b/libnotify.spec
@@ -12,6 +12,7 @@ Group: System Environment/Libraries
 BuildRequires: libtool
 BuildRequires: glib2-devel >= %{glib2_version}
 BuildRequires: gdk-pixbuf2-devel
+BuildRequires: gtk3-devel
 BuildRequires: dbus-devel >= %{dbus_version}
 BuildRequires: dbus-glib-devel >= %{dbus_glib_version}
 Requires: glib2 >= %{glib2_version}