diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index ea9eb4d551b0..fb1bf73ad0ec 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchurl, perl, buildLinux, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "4.6-rc3";
-  modDirVersion = "4.6.0-rc3";
+  version = "4.6-rc4";
+  modDirVersion = "4.6.0-rc4";
   extraMeta.branch = "4.6";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v4.x/testing/linux-${version}.tar.xz";
-    sha256 = "1vhvhbldk5pvwxhdndyzvyqy5mscpnlz09sfyh2c9rk6wc1hc8xv";
+    sha256 = "1c6y6ry8nll8mab0xwwkmpwzp2k4rbp7jl3f4ihi7g2kv2678cbp";
   };
 
   features.iwlwifi = true;