diff --git a/pkgs/development/libraries/libxml2/default.nix b/pkgs/development/libraries/libxml2/default.nix
index c07a5699f92..9883503414b 100644
--- a/pkgs/development/libraries/libxml2/default.nix
+++ b/pkgs/development/libraries/libxml2/default.nix
@@ -32,6 +32,11 @@ stdenv.mkDerivation rec {
       url = "https://gitlab.gnome.org/GNOME/libxml2/commit/0e1a49c8907645d2e155f0d89d4d9895ac5112b5.patch";
       sha256 = "0klvaxkzakkpyq0m44l9xrpn5kwaii194sqsivfm6zhnb9hhl15l";
     })
+    (fetchpatch {
+      name = "CVE-2019-20388.patch";
+      url = "https://gitlab.gnome.org/GNOME/libxml2/commit/6088a74bcf7d0c42e24cff4594d804e1d3c9fbca.patch";
+      sha256 = "070s7al2r2k92320h9cdfc2097jy4kk04d0disc98ddc165r80jl";
+    })
   ];
 
   outputs = [ "bin" "dev" "out" "man" "doc" ]