1 files changed, 1 insertions, 4 deletions
diff --git a/string.c b/string.c
index 134d65b822..fd240bc07a 100644
--- a/string.c
+++ b/string.c
@@ -1909,15 +1909,12 @@ rb_enc_cr_str_buf_cat(VALUE str, const char *ptr, long len,
     int str_encindex = ENCODING_GET(str);
     int res_encindex;
     int str_cr, res_cr;
-    int ptr_a8 = ptr_encindex == 0;
 
     str_cr = ENC_CODERANGE(str);
 
     if (str_encindex == ptr_encindex) {
-        if (str_cr == ENC_CODERANGE_UNKNOWN ||
-            (ptr_a8 && str_cr != ENC_CODERANGE_7BIT)) {
+        if (str_cr == ENC_CODERANGE_UNKNOWN)
             ptr_cr = ENC_CODERANGE_UNKNOWN;
-        }
         else if (ptr_cr == ENC_CODERANGE_UNKNOWN) {
             ptr_cr = coderange_scan(ptr, len, rb_enc_from_index(ptr_encindex));
         }