diff --git a/doc/changes/xrt/mr.459.md b/doc/changes/xrt/mr.459.md
new file mode 100644
index 000000000..09aa3f6ee
--- /dev/null
+++ b/doc/changes/xrt/mr.459.md
@@ -0,0 +1,3 @@
+Add `XRT_SWAPCHAIN_USAGE_INPUT_ATTACHMENT` flag to `xrt_swapchain_usage_bits`
+so that a client can create a Vulkan swapchain that can be used as input
+attachment.
diff --git a/src/xrt/include/xrt/xrt_compositor.h b/src/xrt/include/xrt/xrt_compositor.h
index eda7a79c2..3ee08ce4e 100644
--- a/src/xrt/include/xrt/xrt_compositor.h
+++ b/src/xrt/include/xrt/xrt_compositor.h
@@ -72,7 +72,8 @@ enum xrt_swapchain_usage_bits
 	XRT_SWAPCHAIN_USAGE_TRANSFER_SRC = 0x00000008,
 	XRT_SWAPCHAIN_USAGE_TRANSFER_DST = 0x00000010,
 	XRT_SWAPCHAIN_USAGE_SAMPLED = 0x00000020,
-	XRT_SWAPCHAIN_USAGE_MUTABLE_FORMAT = 0x00000040
+	XRT_SWAPCHAIN_USAGE_MUTABLE_FORMAT = 0x00000040,
+	XRT_SWAPCHAIN_USAGE_INPUT_ATTACHMENT = 0x00000080,
 };
 
 /*!