diff --git a/src/xrt/include/xrt/xrt_openxr_includes.h b/src/xrt/include/xrt/xrt_openxr_includes.h
index cb304e8bf..5616cf639 100644
--- a/src/xrt/include/xrt/xrt_openxr_includes.h
+++ b/src/xrt/include/xrt/xrt_openxr_includes.h
@@ -1,4 +1,4 @@
-// Copyright 2018-2019, Collabora, Ltd.
+// Copyright 2018-2022, Collabora, Ltd.
 // SPDX-License-Identifier: BSL-1.0
 /*!
  * @file
@@ -9,15 +9,9 @@
 
 #pragma once
 
-#include <xrt/xrt_config_have.h>
-
 //! @todo Move these to the build system instead.
 #define XR_USE_TIMESPEC 1
 
-#ifdef XRT_HAVE_VULKAN
-#define XR_USE_GRAPHICS_API_VULKAN
-#endif
-
 #ifdef XR_USE_PLATFORM_ANDROID
 #include <jni.h>
 #endif
diff --git a/src/xrt/state_trackers/oxr/CMakeLists.txt b/src/xrt/state_trackers/oxr/CMakeLists.txt
index d5c6cfc90..4a67aa1dc 100644
--- a/src/xrt/state_trackers/oxr/CMakeLists.txt
+++ b/src/xrt/state_trackers/oxr/CMakeLists.txt
@@ -42,6 +42,7 @@ add_library(
 	)
 
 if(XRT_HAVE_VULKAN)
+	target_compile_definitions(st_oxr PRIVATE XR_USE_GRAPHICS_API_VULKAN)
 	target_sources(st_oxr PRIVATE oxr_session_gfx_vk.c oxr_swapchain_vk.c oxr_vulkan.c)
 	target_link_libraries(st_oxr PUBLIC Vulkan::Vulkan)
 endif()