diff --git a/pkgs/desktops/kde-5/plasma-5.6/libksysguard/default.nix b/pkgs/desktops/kde-5/plasma-5.6/libksysguard/default.nix
index 402b3ce3bee..9c352d76156 100644
--- a/pkgs/desktops/kde-5/plasma-5.6/libksysguard/default.nix
+++ b/pkgs/desktops/kde-5/plasma-5.6/libksysguard/default.nix
@@ -8,11 +8,6 @@ plasmaPackage {
   name = "libksysguard";
   patches = [
     ./0001-qdiriterator-follow-symlinks.patch
-    (fetchpatch { # should be included on update
-      name = "glibc-2.23-isnan.patch";
-      url = https://github.com/KDE/libksysguard/commit/b0578798eb3.patch;
-      sha256 = "1my5nqp58c5azyi265j261a10wh047zxakprrnpl85mlg7bwskdh";
-    })
   ];
   nativeBuildInputs = [
     extra-cmake-modules