diff --git a/pkgs/development/libraries/audio/raul/default.nix b/pkgs/development/libraries/audio/raul/default.nix
index b0b0c6bc59af..63e3ae36028b 100644
--- a/pkgs/development/libraries/audio/raul/default.nix
+++ b/pkgs/development/libraries/audio/raul/default.nix
@@ -2,12 +2,12 @@
 
 stdenv.mkDerivation rec {
   name = "raul-unstable-${rev}";
-  rev = "2016-09-20";
+  rev = "2017-07-23";
 
   src = fetchgit {
     url = "http://git.drobilla.net/cgit.cgi/raul.git";
-    rev = "f8bf77d3c3b77830aedafb9ebb5cdadfea7ed07a";
-    sha256 = "1lby508fb0n8ks6iz959sh18fc37br39d6pbapwvbcw5nckdrxwj";
+    rev = "4db870b2b20b0a608ec0283139056b836c5b1624";
+    sha256 = "04fajrass3ymr72flx5js5vxc601ccrmx8ny8scp0rw7j0igyjdr";
   };
 
   nativeBuildInputs = [ pkgconfig ];