1 files changed, 4 insertions, 2 deletions

diff --git a/src/coding.c b/src/coding.c
index 3a53c95e7e7..a42fbee3a69 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -3141,10 +3141,12 @@ setup_coding_system (coding_system, coding)
         if (reg_bits)
           for (charset = 0; charset <= MAX_CHARSET; charset++)
             {
-              if (CHARSET_VALID_P (charset))
+              if (CHARSET_VALID_P (charset)
+                  && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset)
+                      == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION))
                 {
                   /* There exist some default graphic registers to be
-                     used CHARSET.  */
+                     used by CHARSET.  */
 
                   /* We had better avoid designating a charset of
                      CHARS96 to REG 0 as far as possible.  */