diff --git a/util/test/demos/vk/vk_ext_buffer_address.cpp b/util/test/demos/vk/vk_ext_buffer_address.cpp
index bedcd2d6d..ba2f1a7d9 100644
--- a/util/test/demos/vk/vk_ext_buffer_address.cpp
+++ b/util/test/demos/vk/vk_ext_buffer_address.cpp
@@ -76,6 +76,7 @@ layout(buffer_reference, scalar, buffer_reference_align = 16) buffer DrawData {
   vec4 tint;
   vec2 offset;
   vec2 scale;
+  vec2 padding;
 };
 
 layout(push_constant) uniform PushData {
diff --git a/util/test/demos/vk/vk_khr_buffer_address.cpp b/util/test/demos/vk/vk_khr_buffer_address.cpp
index 854af20c6..75c2b24dd 100644
--- a/util/test/demos/vk/vk_khr_buffer_address.cpp
+++ b/util/test/demos/vk/vk_khr_buffer_address.cpp
@@ -76,6 +76,7 @@ layout(buffer_reference, scalar, buffer_reference_align = 16) buffer DrawData {
   vec4 tint;
   vec2 offset;
   vec2 scale;
+  vec2 padding;
 };
 
 layout(push_constant) uniform PushData {