diff -Nru libglade2-2.6.4/debian/changelog libglade2-2.6.4/debian/changelog
--- libglade2-2.6.4/debian/changelog	2020-08-31 11:54:48.000000000 +0000
+++ libglade2-2.6.4/debian/changelog	2021-08-24 10:05:11.000000000 +0000
@@ -1,3 +1,10 @@
+libglade2 (1:2.6.4-2.4) unstable; urgency=medium
+
+  * Non-maintainer upload.
+  * Build-depend on gtk-doc-tools for gtkdocize. Closes: #978847.
+
+ -- Stephen Kitt <skitt@debian.org>  Tue, 24 Aug 2021 12:05:20 +0200
+
 libglade2 (1:2.6.4-2.3) unstable; urgency=medium
 
   * Non-maintainer upload.
diff -Nru libglade2-2.6.4/debian/control libglade2-2.6.4/debian/control
--- libglade2-2.6.4/debian/control	2020-08-31 11:54:48.000000000 +0000
+++ libglade2-2.6.4/debian/control	2021-08-24 10:05:20.000000000 +0000
@@ -20,7 +20,8 @@
                autotools-dev,
                dpkg-dev (>= 1.13.19),
                libglib2.0-doc,
-               libgtk2.0-doc
+               libgtk2.0-doc,
+               gtk-doc-tools
 
 Package: libglade2-0
 Architecture: any
diff -Nru libglade2-2.6.4/debian/control.in libglade2-2.6.4/debian/control.in
--- libglade2-2.6.4/debian/control.in	2020-08-31 11:49:38.000000000 +0000
+++ libglade2-2.6.4/debian/control.in	2021-08-24 09:57:00.000000000 +0000
@@ -16,7 +16,8 @@
                autotools-dev,
                dpkg-dev (>= 1.13.19),
                libglib2.0-doc,
-               libgtk2.0-doc
+               libgtk2.0-doc,
+               gtk-doc-tools
 
 Package: libglade2-0
 Architecture: any