diff --git a/app/os_windows.go b/app/os_windows.go
index c9d98b62..cc5ca2e5 100644
--- a/app/os_windows.go
+++ b/app/os_windows.go
@@ -451,23 +451,18 @@ func (w *window) hitTest(x, y int) uintptr {
 	if w.config.Mode == Fullscreen {
 		return windows.HTCLIENT
 	}
-	p := f32.Pt(float32(x), float32(y))
-	if a, ok := w.w.ActionAt(p); ok && a == system.ActionMove {
-		return windows.HTCAPTION
-	}
 	if w.config.Mode != Windowed {
 		// Only windowed mode should allow resizing.
 		return windows.HTCLIENT
 	}
+	// Check for resize handle before system actions; otherwise it can be impossible to
+	// resize a custom-decorations window when the system move area is flush with the
+	// edge of the window.
 	top := y <= w.borderSize.Y
 	bottom := y >= w.config.Size.Y-w.borderSize.Y
 	left := x <= w.borderSize.X
 	right := x >= w.config.Size.X-w.borderSize.X
 	switch {
-	default:
-		fallthrough
-	case !top && !bottom && !left && !right:
-		return windows.HTCLIENT
 	case top && left:
 		return windows.HTTOPLEFT
 	case top && right:
@@ -485,6 +480,11 @@ func (w *window) hitTest(x, y int) uintptr {
 	case right:
 		return windows.HTRIGHT
 	}
+	p := f32.Pt(float32(x), float32(y))
+	if a, ok := w.w.ActionAt(p); ok && a == system.ActionMove {
+		return windows.HTCAPTION
+	}
+	return windows.HTCLIENT
 }
 
 func (w *window) pointerButton(btn pointer.Buttons, press bool, lParam uintptr, kmods key.Modifiers) {