diff --git a/pkgs/applications/office/planner/default.nix b/pkgs/applications/office/planner/default.nix
index 687b83948cd1..f454d8830cba 100644
--- a/pkgs/applications/office/planner/default.nix
+++ b/pkgs/applications/office/planner/default.nix
@@ -45,6 +45,9 @@ in stdenv.mkDerivation {
     python2.pkgs.pygtk
   ];
 
+  # glib-2.62 deprecations
+  NIX_CFLAGS_COMPILE = [ "-DGLIB_DISABLE_DEPRECATION_WARNINGS" ];
+
   preConfigure = ''./autogen.sh'';
   configureFlags = [
     "--enable-python"