diff --git a/pkgs/servers/web-apps/mediawiki/default.nix b/pkgs/servers/web-apps/mediawiki/default.nix
index 0bfed296331a..7b8b72f1af7b 100644
--- a/pkgs/servers/web-apps/mediawiki/default.nix
+++ b/pkgs/servers/web-apps/mediawiki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenvNoCC, fetchurl, nixosTests }:
+{ lib, stdenvNoCC, fetchurl, imagemagick, nixosTests }:
 
 stdenvNoCC.mkDerivation rec {
   pname = "mediawiki";
@@ -11,6 +11,10 @@ stdenvNoCC.mkDerivation rec {
 
   postPatch = ''
     sed -i 's|$vars = Installer::getExistingLocalSettings();|$vars = null;|' includes/installer/CliInstaller.php
+
+    # fix generating previews for SVGs
+    substituteInPlace includes/config-schema.php \
+      --replace-fail "\$path/convert" "${imagemagick}/bin/convert"
   '';
 
   installPhase = ''