diff --git a/deps/libbdsg b/deps/libbdsg
index 97e42e0fb0f..6b871a5a2e8 160000
--- a/deps/libbdsg
+++ b/deps/libbdsg
@@ -1 +1 @@
-Subproject commit 97e42e0fb0fe52c0953f52ba971317f83612726b
+Subproject commit 6b871a5a2e8367b97f09f81d59d7d192cff0caa1
diff --git a/src/subpath_overlay.hpp b/src/subpath_overlay.hpp
index 91444e14a43..81ab090c67e 100644
--- a/src/subpath_overlay.hpp
+++ b/src/subpath_overlay.hpp
@@ -1,11 +1,11 @@
-#ifndef VG_SUBGRAPH_OVERLAY_HPP_INCLUDED
-#define VG_SUBGRAPH_OVERLAY_HPP_INCLUDED
+#ifndef VG_SUBPATH_OVERLAY_HPP_INCLUDED
+#define VG_SUBPATH_OVERLAY_HPP_INCLUDED
 
 /**
- * \file subgraph_overlay.hpp
+ * \file subpath_overlay.hpp
  *
- * Provides SourceSinkOverlay, a HandleGraph implementation that joins all the
- * heads and tails of a backing graph to single source and sink nodes. 
+ * Provides SubpathOverlay, a PathHandleGraph overlay that presents an subinterval
+ * of a path as a linearized graph.
  *
  */
 
@@ -104,4 +104,4 @@ class SubpathOverlay : public ExpandingOverlayGraph {
 
 }
 
-#endif
+#endif // VG_SUBPATH_OVERLAY_HPP_INCLUDED