diff --git a/src/xrt/state_trackers/oxr/CMakeLists.txt b/src/xrt/state_trackers/oxr/CMakeLists.txt
index 6f9f5428e..57c5885d4 100644
--- a/src/xrt/state_trackers/oxr/CMakeLists.txt
+++ b/src/xrt/state_trackers/oxr/CMakeLists.txt
@@ -107,7 +107,7 @@ if(XRT_FEATURE_OPENXR_BODY_TRACKING_FB)
 endif()
 
 if(XRT_FEATURE_OPENXR_FACIAL_TRACKING_HTC)
-	target_sources(st_oxr PRIVATE oxr_api_face_tracking.c oxr_face_tracking.c)
+	target_sources(st_oxr PRIVATE oxr_api_face_tracking_htc.c oxr_face_tracking_htc.c)
 endif()
 
 if(XRT_FEATURE_OPENXR_FACE_TRACKING2_FB)
diff --git a/src/xrt/state_trackers/oxr/oxr_api_face_tracking.c b/src/xrt/state_trackers/oxr/oxr_api_face_tracking_htc.c
similarity index 100%
rename from src/xrt/state_trackers/oxr/oxr_api_face_tracking.c
rename to src/xrt/state_trackers/oxr/oxr_api_face_tracking_htc.c
diff --git a/src/xrt/state_trackers/oxr/oxr_face_tracking.c b/src/xrt/state_trackers/oxr/oxr_face_tracking_htc.c
similarity index 100%
rename from src/xrt/state_trackers/oxr/oxr_face_tracking.c
rename to src/xrt/state_trackers/oxr/oxr_face_tracking_htc.c