diff --git a/crates/re_renderer/shader/lines.wgsl b/crates/re_renderer/shader/lines.wgsl
index e214d302f558..afe22189f9c4 100644
--- a/crates/re_renderer/shader/lines.wgsl
+++ b/crates/re_renderer/shader/lines.wgsl
@@ -13,6 +13,11 @@ var position_data_texture: texture_2d<u32>;
 
 struct DrawDataUniformBuffer {
     size_boost_in_points: f32,
+    // In actuality there is way more padding than this since we align all our uniform buffers to
+    // 256bytes in order to allow them to be buffer-suballocations.
+    // However, wgpu doesn't know this at this point and therefore requires `DownlevelFlags::BUFFER_BINDINGS_NOT_16_BYTE_ALIGNED`
+    // if we wouldn't add padding here, which isn't available on WebGL.
+    _padding: Vec4,
 };
 @group(1) @binding(2)
 var<uniform> draw_data: DrawDataUniformBuffer;
diff --git a/crates/re_renderer/shader/point_cloud.wgsl b/crates/re_renderer/shader/point_cloud.wgsl
index 86b12cfd2214..6984ce45d6b6 100644
--- a/crates/re_renderer/shader/point_cloud.wgsl
+++ b/crates/re_renderer/shader/point_cloud.wgsl
@@ -12,6 +12,11 @@ var color_texture: texture_2d<f32>;
 
 struct DrawDataUniformBuffer {
     size_boost_in_points: f32,
+    // In actuality there is way more padding than this since we align all our uniform buffers to
+    // 256bytes in order to allow them to be buffer-suballocations.
+    // However, wgpu doesn't know this at this point and therefore requires `DownlevelFlags::BUFFER_BINDINGS_NOT_16_BYTE_ALIGNED`
+    // if we wouldn't add padding here, which isn't available on WebGL.
+    _padding: Vec4,
 };
 @group(1) @binding(2)
 var<uniform> draw_data: DrawDataUniformBuffer;