diff --git a/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs b/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
index c7fce95fbc..a2801bb170 100644
--- a/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
+++ b/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
@@ -987,7 +987,7 @@ namespace Avalonia.Win32.Interop
         
         [DllImport("user32", EntryPoint = "GetMonitorInfoW", ExactSpelling = true, CharSet = CharSet.Unicode)]
         [return: MarshalAs(UnmanagedType.Bool)]
-        public static extern bool GetMonitorInfo([In] IntPtr hMonitor, [Out] MONITORINFO lpmi);
+        public static extern bool GetMonitorInfo([In] IntPtr hMonitor, ref MONITORINFO lpmi);
 
         [return: MarshalAs(UnmanagedType.Bool)]
         [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode, EntryPoint = "PostMessageW")]
diff --git a/src/Windows/Avalonia.Win32/ScreenImpl.cs b/src/Windows/Avalonia.Win32/ScreenImpl.cs
index 6d56a5e213..81f6b0e65c 100644
--- a/src/Windows/Avalonia.Win32/ScreenImpl.cs
+++ b/src/Windows/Avalonia.Win32/ScreenImpl.cs
@@ -27,7 +27,7 @@ namespace Avalonia.Win32
                         (IntPtr monitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr data) =>
                         {
                             MONITORINFO monitorInfo = MONITORINFO.NewMONITORINFO();
-                            if (GetMonitorInfo(monitor, monitorInfo))
+                            if (GetMonitorInfo(monitor,ref monitorInfo))
                             {
                                 RECT bounds = monitorInfo.rcMonitor;
                                 RECT workingArea = monitorInfo.rcWork;
diff --git a/src/Windows/Avalonia.Win32/WindowImpl.cs b/src/Windows/Avalonia.Win32/WindowImpl.cs
index bd37aa6109..bbae965a22 100644
--- a/src/Windows/Avalonia.Win32/WindowImpl.cs
+++ b/src/Windows/Avalonia.Win32/WindowImpl.cs
@@ -839,7 +839,7 @@ namespace Avalonia.Win32
             {
                 MONITORINFO monitorInfo = MONITORINFO.NewMONITORINFO();
 
-                if (GetMonitorInfo(monitor, monitorInfo))
+                if (GetMonitorInfo(monitor,ref monitorInfo))
                 {
                     RECT rcMonitorArea = monitorInfo.rcMonitor;