diff --git a/pkgs/development/libraries/webkit/src-for-default.nix b/pkgs/development/libraries/webkit/src-for-default.nix
index e8545faf3b4..e1b3fe07d81 100644
--- a/pkgs/development/libraries/webkit/src-for-default.nix
+++ b/pkgs/development/libraries/webkit/src-for-default.nix
@@ -1,7 +1,7 @@
 rec {
    version="r48908";
    name="webkit-r48908";
-   hash="";
+   hash="18hymchzix56yhl830mxfiayxxjhd5kgm3ga4jc9k627ypqsdycg";
    url="http://builds.nightly.webkit.org/files/trunk/src/WebKit-r48908.tar.bz2";
    advertisedUrl="http://builds.nightly.webkit.org/files/trunk/src/WebKit-r48908.tar.bz2";