diff --git a/src/hb-subset.h b/src/hb-subset.h
index d64ea7b..24a5621 100644
--- a/src/hb-subset.h
+++ b/src/hb-subset.h
@@ -72,7 +72,7 @@
  * @HB_SUBSET_FLAGS_NO_PRUNE_UNICODE_RANGES: If set then the unicode ranges in
  * OS/2 will not be recalculated.
  * @HB_SUBSET_FLAGS_NO_LAYOUT_CLOSURE: If set don't perform glyph closure on layout
- * tables (GSUB, GPOS, GDEF).
+ * substitution rules (GSUB).
  *
  * List of boolean properties that can be configured on the subset input.
  *
diff --git a/util/hb-subset.cc b/util/hb-subset.cc
index 1c2485d..cdab3ef 100644
--- a/util/hb-subset.cc
+++ b/util/hb-subset.cc
@@ -941,7 +941,7 @@
     {"set-overlaps-flag",	0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG>,	"Set the overlaps flag on each glyph.", nullptr},
     {"notdef-outline",		0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_NOTDEF_OUTLINE>,		"Keep the outline of \'.notdef\' glyph", nullptr},
     {"no-prune-unicode-ranges",	0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_NO_PRUNE_UNICODE_RANGES>,	"Don't change the 'OS/2 ulUnicodeRange*' bits.", nullptr},
-    {"no-layout-closure",	0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_NO_LAYOUT_CLOSURE>,	"Don't perform glyph closure for layout tables (GSUB, GPOS, GDEF).", nullptr},
+    {"no-layout-closure",	0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_NO_LAYOUT_CLOSURE>,	"Don't perform glyph closure for layout substitution (GSUB).", nullptr},
     {"glyph-names",		0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_GLYPH_NAMES>,		"Keep PS glyph names in TT-flavored fonts. ", nullptr},
     {"passthrough-tables",	0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_PASSTHROUGH_UNRECOGNIZED>,	"Do not drop tables that the tool does not know how to subset.", nullptr},
     {"preprocess-face",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE, &this->preprocess,