diff --git a/src/virtio/vulkan/vn_descriptor_set.c b/src/virtio/vulkan/vn_descriptor_set.c
index 82f3fbfe4fb..f9fd86830fd 100644
--- a/src/virtio/vulkan/vn_descriptor_set.c
+++ b/src/virtio/vulkan/vn_descriptor_set.c
@@ -341,7 +341,7 @@ vn_CreateDescriptorPool(VkDevice device,
 
       assert(type_index < VN_NUM_DESCRIPTOR_TYPES);
 
-      if (type_index == VN_DESCRIPTOR_TYPE_MUTABLE_EXT) {
+      if (pool_size->type == VK_DESCRIPTOR_TYPE_MUTABLE_EXT) {
          struct vn_descriptor_pool_state_mutable *mutable_state = NULL;
          BITSET_DECLARE(mutable_types, VN_NUM_DESCRIPTOR_TYPES);
          if (!mutable_descriptor_info ||