diff --git a/renderdoc/driver/vulkan/vk_resources.cpp b/renderdoc/driver/vulkan/vk_resources.cpp
index b47f172ae..e81123930 100644
--- a/renderdoc/driver/vulkan/vk_resources.cpp
+++ b/renderdoc/driver/vulkan/vk_resources.cpp
@@ -586,6 +586,7 @@ uint32_t GetByteSize(uint32_t Width, uint32_t Height, uint32_t Depth, VkFormat F
     case VK_FORMAT_R5G6B5_UNORM_PACK16:
     case VK_FORMAT_R5G5B5A1_UNORM_PACK16:
     case VK_FORMAT_B5G5R5A1_UNORM_PACK16:
+    case VK_FORMAT_A1R5G5B5_UNORM_PACK16:
     case VK_FORMAT_B5G6R5_UNORM_PACK16:
     case VK_FORMAT_R4G4B4A4_UNORM_PACK16:
     case VK_FORMAT_B4G4R4A4_UNORM_PACK16: ret *= 2; break;