diff --git a/pkgs/development/compilers/sbcl/default.nix b/pkgs/development/compilers/sbcl/default.nix
index b9e3011194d8..80f7ea8cc3ca 100644
--- a/pkgs/development/compilers/sbcl/default.nix
+++ b/pkgs/development/compilers/sbcl/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name    = "sbcl-${version}";
-  version = "1.2.11";
+  version = "1.2.12";
 
   src = fetchurl {
     url    = "mirror://sourceforge/project/sbcl/sbcl/${version}/${name}-source.tar.bz2";
-    sha256 = "0w1ymazyck5a8bjmsbnq1hps1n4824h3ajh849f1y09dwzd09al8";
+    sha256 = "1bf98wi3gz8n09prwmxa38b2mhq69rqq11s9h9swi3avy5wchnxn";
   };
 
   buildInputs = [ which ]