diff --git a/pkgs/development/python-modules/pyqtwebengine/default.nix b/pkgs/development/python-modules/pyqtwebengine/default.nix
index ff511103e55..51506598ca1 100644
--- a/pkgs/development/python-modules/pyqtwebengine/default.nix
+++ b/pkgs/development/python-modules/pyqtwebengine/default.nix
@@ -7,6 +7,10 @@ let
 
   inherit (pythonPackages) buildPythonPackage python isPy3k pyqt5 enum34;
   inherit (pyqt5) sip;
+  # source: https://www.riverbankcomputing.com/pipermail/pyqt/2020-June/042985.html
+  patches = lib.optional (lib.hasPrefix "5.14" pyqt5.version)
+    [ ./fix-build-with-qt-514.patch ]
+  ;
 
 in buildPythonPackage rec {
   pname = "PyQtWebEngine";
@@ -18,10 +22,7 @@ in buildPythonPackage rec {
     sha256 = "0xdzhl07x3mzfnr5cf4d640168vxi7fyl0fz1pvpbgs0irl14237";
   };
 
-  patches = [
-    # source: https://www.riverbankcomputing.com/pipermail/pyqt/2020-June/042985.html
-    ./fix-build-with-qt-514.patch
-  ];
+  inherit patches;
 
   outputs = [ "out" "dev" ];