diff --git a/src/xrt/state_trackers/oxr/oxr_input.c b/src/xrt/state_trackers/oxr/oxr_input.c
index 936053928..28f769dce 100644
--- a/src/xrt/state_trackers/oxr/oxr_input.c
+++ b/src/xrt/state_trackers/oxr/oxr_input.c
@@ -77,6 +77,39 @@ oxr_action_bind_io(struct oxr_logger *log,
                    struct oxr_interaction_profile *profile,
                    enum oxr_subaction_path subaction_path);
 
+/*!
+ * Helper function to combine @ref oxr_subaction_paths structs, but skipping
+ * @ref oxr_subaction_paths::any.
+ *
+ * If a real (non-"any") subaction path in @p new_subaction_paths is true, it will be
+ * true in @p subaction_paths.
+ *
+ * @private @memberof oxr_subaction_paths
+ */
+static inline void
+oxr_subaction_paths_accumulate_except_any(struct oxr_subaction_paths *subaction_paths,
+                                          const struct oxr_subaction_paths *new_subaction_paths)
+{
+#define ACCUMULATE_SUBACTION_PATHS(X) subaction_paths->X |= new_subaction_paths->X;
+	OXR_FOR_EACH_SUBACTION_PATH(ACCUMULATE_SUBACTION_PATHS)
+#undef ACCUMULATE_SUBACTION_PATHS
+}
+
+/*!
+ * Helper function to combine @ref oxr_subaction_paths structs.
+ *
+ * If a subaction path in @p new_subaction_paths is true, it will be true in @p subaction_paths.
+ *
+ * @private @memberof oxr_subaction_paths
+ */
+static inline void
+oxr_subaction_paths_accumulate(struct oxr_subaction_paths *subaction_paths,
+                               const struct oxr_subaction_paths *new_subaction_paths)
+{
+	subaction_paths->any |= new_subaction_paths->any;
+	oxr_subaction_paths_accumulate_except_any(subaction_paths, new_subaction_paths);
+}
+
 /*
  *
  * Action attachment functions
diff --git a/src/xrt/state_trackers/oxr/oxr_objects.h b/src/xrt/state_trackers/oxr/oxr_objects.h
index 546da745b..a0b087f9e 100644
--- a/src/xrt/state_trackers/oxr/oxr_objects.h
+++ b/src/xrt/state_trackers/oxr/oxr_objects.h
@@ -1914,6 +1914,24 @@ struct oxr_subaction_paths
 #undef OXR_SUBPATH_MEMBER
 };
 
+/*!
+ * Helper function to determine if the set of paths in @p a is a subset of the
+ * paths in @p b.
+ *
+ * @public @memberof oxr_subaction_paths
+ */
+static inline bool
+oxr_subaction_paths_is_subset_of(const struct oxr_subaction_paths *a, const struct oxr_subaction_paths *b)
+{
+#define OXR_CHECK_SUBACTION_PATHS(X)                                                                                   \
+	if (a->X && !b->X) {                                                                                           \
+		return false;                                                                                          \
+	}
+	OXR_FOR_EACH_SUBACTION_PATH(OXR_CHECK_SUBACTION_PATHS)
+#undef OXR_CHECK_SUBACTION_PATHS
+	return true;
+}
+
 /*!
  * The data associated with the attachment of an Action Set (@ref
  * oxr_action_set) to as Session (@ref oxr_session).