diff --git a/crates/bevy_pbr/src/volumetric_fog/render.rs b/crates/bevy_pbr/src/volumetric_fog/render.rs
index 292ad1c86a..632a6f2c30 100644
--- a/crates/bevy_pbr/src/volumetric_fog/render.rs
+++ b/crates/bevy_pbr/src/volumetric_fog/render.rs
@@ -694,20 +694,20 @@ pub fn prepare_volumetric_fog_uniforms(
     render_queue: Res<RenderQueue>,
     mut local_from_world_matrices: Local<Vec<Mat4>>,
 ) {
-    let Some(mut writer) = volumetric_lighting_uniform_buffer.get_writer(
-        view_targets.iter().len(),
-        &render_device,
-        &render_queue,
-    ) else {
-        return;
-    };
-
     // Do this up front to avoid O(n^2) matrix inversion.
     local_from_world_matrices.clear();
     for (_, _, fog_transform) in fog_volumes.iter() {
         local_from_world_matrices.push(fog_transform.compute_matrix().inverse());
     }
 
+    let uniform_count = view_targets.iter().len() * local_from_world_matrices.len();
+
+    let Some(mut writer) =
+        volumetric_lighting_uniform_buffer.get_writer(uniform_count, &render_device, &render_queue)
+    else {
+        return;
+    };
+
     for (view_entity, extracted_view, volumetric_fog) in view_targets.iter() {
         let world_from_view = extracted_view.world_from_view.compute_matrix();