diff --git a/src/server/event.rs b/src/server/event.rs
index c877b7d..0da6206 100644
--- a/src/server/event.rs
+++ b/src/server/event.rs
@@ -227,8 +227,8 @@ impl SurfaceEvents {
             let (scale_factor, window, window_data) = query.get().unwrap();
 
             let window = *window;
-            let x = (pending.x as f64 * scale_factor.0) as i32 + window_data.output_offset.x;
-            let y = (pending.y as f64 * scale_factor.0) as i32 + window_data.output_offset.y;
+            let x = (pending.x.max(0) as f64 * scale_factor.0) as i32 + window_data.output_offset.x;
+            let y = (pending.y.max(0) as f64 * scale_factor.0) as i32 + window_data.output_offset.y;
             let width = if pending.width > 0 {
                 (pending.width as f64 * scale_factor.0) as u16
             } else {
diff --git a/src/server/mod.rs b/src/server/mod.rs
index 4f7d57f..ce6af7b 100644
--- a/src/server/mod.rs
+++ b/src/server/mod.rs
@@ -25,6 +25,7 @@ use wayland_protocols::xdg::decoration::zv1::client::zxdg_decoration_manager_v1:
 use wayland_protocols::xdg::decoration::zv1::client::zxdg_toplevel_decoration_v1::{
     self, ZxdgToplevelDecorationV1,
 };
+use wayland_protocols::xdg::shell::client::xdg_positioner::ConstraintAdjustment;
 use wayland_protocols::{
     wp::{
         fractional_scale::v1::client::wp_fractional_scale_manager_v1::WpFractionalScaleManagerV1,
@@ -1407,6 +1408,8 @@ impl<S: X11Selection + 'static> InnerServerState<S> {
             (parent_window.attrs.dims.width as f64 / initial_scale) as i32,
             (parent_window.attrs.dims.height as f64 / initial_scale) as i32,
         );
+        positioner
+            .set_constraint_adjustment(ConstraintAdjustment::SlideX | ConstraintAdjustment::SlideY);
         let popup = xdg.get_popup(
             Some(&parent_role.xdg().unwrap().surface),
             &positioner,
diff --git a/testwl/src/lib.rs b/testwl/src/lib.rs
index b79f367..899e0b4 100644
--- a/testwl/src/lib.rs
+++ b/testwl/src/lib.rs
@@ -1740,6 +1740,7 @@ impl Dispatch<XdgPositioner, ()> for State {
             xdg_positioner::Request::Destroy => {
                 data.remove();
             }
+            xdg_positioner::Request::SetConstraintAdjustment { .. } => {}
             other => todo!("unhandled positioner request {other:?}"),
         }
     }