diff --git a/crates/bevy_render/src/camera/projection.rs b/crates/bevy_render/src/camera/projection.rs
index b0ea170c75f6e..fce72aa8460e1 100644
--- a/crates/bevy_render/src/camera/projection.rs
+++ b/crates/bevy_render/src/camera/projection.rs
@@ -103,12 +103,14 @@ impl CameraProjection for OrthographicProjection {
     fn update(&mut self, width: f32, height: f32) {
         match (&self.scaling_mode, &self.window_origin) {
             (ScalingMode::WindowSize, WindowOrigin::Center) => {
-                let half_width = width / 2.0;
-                let half_height = height / 2.0;
-                self.left = -half_width;
+                let half_width = (width / 2.0).round();
+                let half_height = (height / 2.0).round();
+                // Assign left and bottom such that (right-left)==width and (top-bottom)==height
+                // still hold with  with rounded half_width and half_height
+                self.left = half_width - width;
                 self.right = half_width;
                 self.top = half_height;
-                self.bottom = -half_height;
+                self.bottom = half_height - height;
             }
             (ScalingMode::WindowSize, WindowOrigin::BottomLeft) => {
                 self.left = 0.0;