diff --git a/pkgs/applications/graphics/ktikz/default.nix b/pkgs/applications/graphics/ktikz/default.nix
index f817a3321606..d0d9f100878f 100644
--- a/pkgs/applications/graphics/ktikz/default.nix
+++ b/pkgs/applications/graphics/ktikz/default.nix
@@ -31,10 +31,16 @@ stdenv.mkDerivation rec {
   };
 
   patches = [
+    # Fix version in qtikz.pro
     (fetchpatch {
       url = "https://github.com/fhackenberger/ktikz/commit/972685a406517bb85eb561f2c8e26f029eacd7db.patch";
       sha256 = "13z40rcd4m4n088v7z2ns17lnpn0z3rzp31lsamic3qdcwjwa5k8";
     })
+    # Fix missing qt5.15 QPainterPath include
+    (fetchpatch {
+      url = "https://github.com/fhackenberger/ktikz/commit/ebe4dfb72ac8a137b475ef688b9f7ac3e5c7f242.patch";
+      sha256 = "GIgPh+iUBPftHKIpZR3a0FxmLhMLuPUapF/t+bCuqMs=";
+    })
   ];
 
   nativeBuildInputs = [ pkgconfig qttools qmake wrapQtAppsHook ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7c2a71aa09e6..6459f07ff5bc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6727,7 +6727,7 @@ in
 
   qr-filetransfer = callPackage ../tools/networking/qr-filetransfer { };
 
-  qtikz = libsForQt514.callPackage ../applications/graphics/ktikz { };
+  qtikz = libsForQt5.callPackage ../applications/graphics/ktikz { };
 
   quickjs = callPackage ../development/interpreters/quickjs { };