diff -u libx11-1.6.9/debian/changelog libx11-1.6.9/debian/changelog
--- libx11-1.6.9/debian/changelog
+++ libx11-1.6.9/debian/changelog
@@ -1,3 +1,10 @@
+libx11 (2:1.6.9-2ubuntu1) focal; urgency=medium
+
+  * control: Bump build-dep on x11proto-dev to make sure we have all
+    the new keysyms.
+
+ -- Timo Aaltonen <tjaalton@debian.org>  Mon, 09 Mar 2020 14:45:02 +0200
+
 libx11 (2:1.6.9-2) unstable; urgency=medium
 
   * control: Depend on x11proto-dev instead of the old protos, bump the
diff -u libx11-1.6.9/debian/control libx11-1.6.9/debian/control
--- libx11-1.6.9/debian/control
+++ libx11-1.6.9/debian/control
@@ -7,7 +7,7 @@
  dpkg-dev (>= 1.18.0),
  pkg-config,
  xtrans-dev,
- x11proto-dev,
+ x11proto-dev (>= 2019.2-1ubuntu1),
  libxcb1-dev (>= 1.11.1),
  quilt,
  xutils-dev (>= 1:7.6+2),