diff --git a/appveyor.yml b/appveyor.yml
index 177fb5f..5528d28 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -24,8 +24,9 @@ install:
         if ($env:BUILD_TYPE -eq 'mingw') {
           $dependencies = "mingw64/mingw-w64-x86_64-cmake mingw64/mingw-w64-x86_64-qt5-static"
           C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S $dependencies"
-          # (HACK) Replace libzstd.dll.a with libzstd.a to really static link qt
+          # (HACK) Link these libs to really static link qt
           C:\msys64\usr\bin\bash -lc "rm /mingw64/lib/libzstd.dll.a && link /mingw64/lib/libzstd.a /mingw64/lib/libzstd.dll.a"
+          C:\msys64\usr\bin\bash -lc "rm /mingw64/lib/libz.dll.a && link /mingw64/lib/libz.a /mingw64/lib/libz.dll.a"
           # (HACK) ignore errors
           0
         }