diff --git a/pkgs/development/libraries/qt-5/5.12/default.nix b/pkgs/development/libraries/qt-5/5.12/default.nix
index d68944620190..2800f2d77978 100644
--- a/pkgs/development/libraries/qt-5/5.12/default.nix
+++ b/pkgs/development/libraries/qt-5/5.12/default.nix
@@ -65,7 +65,7 @@ let
         ./qtbase.patch.d/0009-qtbase-tzdir.patch
         ./qtbase.patch.d/0010-qtbase-qtpluginpath.patch
         ./qtbase.patch.d/0011-qtbase-assert.patch
-        ./qtbase.patch.d/0012-fix-header-module.patch
+        ./qtbase.patch.d/0012-fix-header_module.patch
       ];
     qtdeclarative = [ ./qtdeclarative.patch ];
     qtscript = [ ./qtscript.patch ];