diff --git a/pkgs/by-name/pg/pgf3/package.nix b/pkgs/by-name/pg/pgf3/package.nix
index 234908c8606e..2ee9301d60b0 100644
--- a/pkgs/by-name/pg/pgf3/package.nix
+++ b/pkgs/by-name/pg/pgf3/package.nix
@@ -6,13 +6,13 @@
 
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "pgf";
-  version = "3.1.11";
+  version = "3.1.11a";
 
   src = fetchFromGitHub {
     owner = "pgf-tikz";
     repo = "pgf";
     tag = finalAttrs.version;
-    hash = "sha256-YBoGukCggj0jb1Y+EWZBoaW2XIQpb7ks/nHp4jsSBak=";
+    hash = "sha256-+OxQ7sf5qh9hiVdCapJOUUwxDNsbvCXZEupN52wqldE=";
   };
 
   dontConfigure = true;