diff --git a/gtkglext.spec b/gtkglext.spec
index 6cb9ad7..180e2e5 100644
--- a/gtkglext.spec
+++ b/gtkglext.spec
@@ -72,6 +72,7 @@ which support OpenGL rendering in GTK, and GtkWidget API add-ons to
 make GTK+ widgets OpenGL-capable.
 
 %package doc
+License:        LGPL-2.1+
 Summary:        Documentation of the OpenGL Extension to GTK
 Group:          System/Libraries
 Requires:       libgtkglext-x11-1_0-0 = %{version}