diff --git a/pkgs/applications/misc/gnuradio/default.nix b/pkgs/applications/misc/gnuradio/default.nix
index 7ef9fbf351f7..3fc3e1e8e5f3 100644
--- a/pkgs/applications/misc/gnuradio/default.nix
+++ b/pkgs/applications/misc/gnuradio/default.nix
@@ -23,11 +23,11 @@
 
 stdenv.mkDerivation rec {
   name = "gnuradio-${version}";
-  version = "3.7.1";
+  version = "3.7.2.1";
 
   src = fetchurl {
     url = "http://gnuradio.org/releases/gnuradio/${name}.tar.gz";
-    sha256 = "1kfni8vpgr6v9rdiz3zsmwc07qj6zka9x22z2y0y4rak2xnzdxz9";
+    sha256 = "101wr19nxfc5x7i4s10vgrypaa0vj2pkg8b2vn5j5s9iv8gpwswc";
   };
 
   buildInputs = [