1 files changed, 2 insertions, 2 deletions

diff --git a/src/coding.h b/src/coding.h
index 3e89ff10421..27bc8333c6d 100644
--- a/src/coding.h
+++ b/src/coding.h
@@ -735,11 +735,11 @@ extern void encode_coding_object P_ ((struct coding_system *,
 
 #define decode_coding_string(coding, string, nocopy)                    \
   decode_coding_object (coding, string, 0, 0, SCHARS (string),          \
-                        STRING_BYTES (XSTRING (string)), Qt)
+                        SBYTES (string), Qt)
 
 #define encode_coding_string(coding, string, nocopy)                    \
   (encode_coding_object (coding, string, 0, 0, SCHARS (string),         \
-                         STRING_BYTES (XSTRING (string)), Qt),          \
+                         SBYTES (string), Qt),                          \
    (coding)->dst_object)