diff --git a/pkgs/development/libraries/fltk/1.4.nix b/pkgs/development/libraries/fltk/1.4.nix
index 2a430844ebe..d5aa780affa 100644
--- a/pkgs/development/libraries/fltk/1.4.nix
+++ b/pkgs/development/libraries/fltk/1.4.nix
@@ -1,5 +1,5 @@
 import ./common.nix rec {
-  version = "1.4.x-2021-07-04";
-  rev = "1008cdfab27609a6f6a0e82dadad9fd9cbd8a66d";
-  sha256 = "1h057dyhd04b9bjci952b2l7brxv183l9jw9i50mn9qjfljmvqim";
+  version = "1.4.x-2021-12-21";
+  rev = "c8bb2a35850be7c6eaec5ad5a2936a77f7913de2";
+  sha256 = "1fwfg1hp1ajqh2b4ra4phi96854q9i8c0gbyi7pr35ljyv848295";
 }