diff --git a/crates/fj-viewer/src/viewer.rs b/crates/fj-viewer/src/viewer.rs
index cd7a1af8b..3e237251b 100644
--- a/crates/fj-viewer/src/viewer.rs
+++ b/crates/fj-viewer/src/viewer.rs
@@ -84,7 +84,10 @@ impl Viewer {
     /// Handle the screen being resized
     pub fn on_screen_resize(&mut self, new_size: ScreenSize) {
         self.current_screen_size = new_size;
-        self.renderer.handle_resize(new_size);
+        if new_size.is_valid() {
+            // We should only supply valid screen sizes to the renderer.
+            self.renderer.handle_resize(new_size);
+        }
     }
 
     /// Compute and store a focus point, unless one is already stored
diff --git a/crates/fj-window/src/display.rs b/crates/fj-window/src/display.rs
index a97a181ac..4b6fa78e6 100644
--- a/crates/fj-window/src/display.rs
+++ b/crates/fj-window/src/display.rs
@@ -147,9 +147,7 @@ impl ApplicationHandler for DisplayState {
                 // Only do a screen resize once per frame. This protects against
                 // spurious resize events that cause issues with the renderer.
                 if let Some(size) = self.new_size.take() {
-                    if !self.stop_drawing {
-                        viewer.on_screen_resize(size);
-                    }
+                    viewer.on_screen_resize(size);
                 }
 
                 viewer.draw();