diff --git a/data/skeletons/bison.m4 b/data/skeletons/bison.m4
index 365ee72e..7ab1cb91 100644
--- a/data/skeletons/bison.m4
+++ b/data/skeletons/bison.m4
@@ -633,11 +633,11 @@ m4_define([_b4_type_action],
 
 ])])
 
-# b4_type_foreach(MACRO)
-# ----------------------
+# b4_type_foreach(MACRO, [SEP])
+# -----------------------------
 # Invoke MACRO(SYMBOL-NUMS) for each set of SYMBOL-NUMS for each type set.
 m4_define([b4_type_foreach],
-          [m4_map([$1], m4_defn([b4_type_names]))])
+          [m4_map_sep([$1], [$2], m4_defn([b4_type_names]))])
 
 
 
diff --git a/data/skeletons/c++.m4 b/data/skeletons/c++.m4
index b7a2a3a8..78c66def 100644
--- a/data/skeletons/c++.m4
+++ b/data/skeletons/c++.m4
@@ -321,8 +321,9 @@ m4_define([b4_symbol_type_define],
       /// Copy constructor.
       basic_symbol (const basic_symbol& that);]b4_variant_if([[
 
-      /// Constructor for valueless symbols, and symbols from each type.
-]b4_type_foreach([b4_basic_symbol_constructor_define])], [[
+      /// Constructors for typed symbols.
+]b4_type_foreach([b4_basic_symbol_constructor_define], [
+])], [[
       /// Constructor for valueless symbols.
       basic_symbol (typename Base::kind_type t]b4_locations_if([,
                     YY_MOVE_REF (location_type) l])[);