diff --git a/pkgs/applications/science/math/pcalc/default.nix b/pkgs/applications/science/math/pcalc/default.nix
index 8e68e455ef18..c291c0ce6e5b 100644
--- a/pkgs/applications/science/math/pcalc/default.nix
+++ b/pkgs/applications/science/math/pcalc/default.nix
@@ -4,12 +4,12 @@ with stdenv.lib;
 
 stdenv.mkDerivation rec {
   name = "pcalc-${version}";
-  version = "20120812";
+  version = "20141224";
 
   src = fetchgit {
     url = git://git.code.sf.net/p/pcalc/code;
-    rev = "db5c5d587d4d24ff6b23405a92eeaad4c0f99618";
-    sha256 = "1bzmiz9rrss3xk0vzszbisjkph73zwgc0riqn9zdd2h1iv6dgq92";
+    rev = "181d60d3c880da4344fef7138065943eb3b9255f";
+    sha256 = "0n60m3p4kkqvvswjf50mnfaaacmzi1lss8vgy63mrgzwi9v6yb4l";
   };
 
   makeFlags = [ "DESTDIR= BINDIR=$(out)/bin" ];