diff --git a/pkgs/development/libraries/osip/default.nix b/pkgs/development/libraries/osip/default.nix
index a243b5c0b51..a4a2a51402b 100644
--- a/pkgs/development/libraries/osip/default.nix
+++ b/pkgs/development/libraries/osip/default.nix
@@ -1,9 +1,9 @@
 {stdenv, fetchurl}:
 stdenv.mkDerivation rec {
-  version = "5.1.0";
+  version = "5.1.1";
   src = fetchurl {
     url = "mirror://gnu/osip/libosip2-${version}.tar.gz";
-    sha256 = "0igic785fh458ck33kxb6i34l7bzdp9zpfjy5dxrcvv5gacklms0";
+    sha256 = "0kgnxgzf968kbl6rx3hjsfb3jsg4ydgrsf35gzj319i1f8qjifv1";
   };
   pname = "libosip2";