diff --git a/pkgs/applications/science/math/calc/default.nix b/pkgs/applications/science/math/calc/default.nix
index 74c8454a5c38..f76722f6715a 100644
--- a/pkgs/applications/science/math/calc/default.nix
+++ b/pkgs/applications/science/math/calc/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
       "https://github.com/lcn2/calc/releases/download/v${version}/calc-${version}.tar.bz2"
       "http://www.isthe.com/chongo/src/calc/calc-${version}.tar.bz2"
     ];
-    sha256 = "sha256-bPacYnEJBdQsIP+Z8D/ODskyEcvhgAy3ra4wasYMo6A=";
+    hash = "sha256-bPacYnEJBdQsIP+Z8D/ODskyEcvhgAy3ra4wasYMo6A=";
   };
 
   postPatch = ''