diff --git a/pkgs/development/libraries/libow/default.nix b/pkgs/development/libraries/libow/default.nix
index 1f67e1fc791b71..d7e83e7a9e3de2 100644
--- a/pkgs/development/libraries/libow/default.nix
+++ b/pkgs/development/libraries/libow/default.nix
@@ -1,14 +1,14 @@
 { stdenv, fetchFromGitHub, autoconf, automake, pkgconfig, libtool }:
 
 stdenv.mkDerivation rec {
-  version = "3.2p3";
+  version = "3.2p4";
   pname = "libow";
 
   src = fetchFromGitHub {
     owner = "owfs";
     repo = "owfs";
     rev = "v${version}";
-    sha256 = "02l3r4ixhicph5iqxdjanck2gbqkfs9vnnac112bzlvlw3x9r03m";
+    sha256 = "0dln1ar7bxwhpi36sccmpwapy7iz4j097rbf02mgn42lw5vrcg3s";
   };
 
   nativeBuildInputs = [ autoconf automake pkgconfig ];