1 files changed, 8 insertions, 3 deletions

diff --git a/src/keymap.c b/src/keymap.c
index 2cecfcd3762..536b27dae7e 100644
--- a/src/keymap.c
+++ b/src/keymap.c
@@ -1327,6 +1327,8 @@ then the value includes only maps for prefixes that start with PREFIX.")
       thismap = Fcdr (Fcar (tail));
       last = make_number (XINT (Flength (thisseq)) - 1);
       is_metized = (XINT (last) >= 0
+                    /* Don't metize the last char of PREFIX.  */
+                    && XINT (last) >= prefixlen
                     && EQ (Faref (thisseq, last), meta_prefix_char));
 
       for (; CONSP (thismap); thismap = XCONS (thismap)->cdr)
@@ -1406,9 +1408,12 @@ then the value includes only maps for prefixes that start with PREFIX.")
                          turn it into a meta-ized keystroke.  */
                       if (is_metized && INTEGERP (elt))
                         {
-                          tem = Fcopy_sequence (thisseq);
-                          Faset (tem, last,
-                                 make_number (XINT (elt) | meta_modifier));
+                          Lisp_Object element;
+
+                          element = thisseq;
+                          tem = Fvconcat (1, &element);
+                          XVECTOR (tem)->contents[XINT (last)]
+                            = XINT (elt) | meta_modifier;
 
                           /* This new sequence is the same length as
                              thisseq, so stick it in the list right