diff --git a/pkgs/development/python-modules/pyside2/default.nix b/pkgs/development/python-modules/pyside2/default.nix
index 81df3cbe94c6..5826ed7be160 100644
--- a/pkgs/development/python-modules/pyside2/default.nix
+++ b/pkgs/development/python-modules/pyside2/default.nix
@@ -23,6 +23,8 @@ stdenv.mkDerivation rec {
     "-DPYTHON_EXECUTABLE=${python.interpreter}"
   ];
 
+  NIX_CFLAGS_COMPILE = "-I${qt5.qtdeclarative.dev}/include/QtQuick/${qt5.qtdeclarative.version}/QtQuick";
+
   nativeBuildInputs = [ cmake ninja qt5.qmake python ];
   buildInputs = (with qt5; [
     qtbase qtxmlpatterns qtmultimedia qttools qtx11extras qtlocation qtscript