1 files changed, 2 insertions, 2 deletions

diff --git a/src/coding.h b/src/coding.h
index 450433fda96..3e89ff10421 100644
--- a/src/coding.h
+++ b/src/coding.h
@@ -734,11 +734,11 @@ extern void encode_coding_object P_ ((struct coding_system *,
 
 
 #define decode_coding_string(coding, string, nocopy)                    \
-  decode_coding_object (coding, string, 0, 0, XSTRING (string)->size,   \
+  decode_coding_object (coding, string, 0, 0, SCHARS (string),          \
                         STRING_BYTES (XSTRING (string)), Qt)
 
 #define encode_coding_string(coding, string, nocopy)                    \
-  (encode_coding_object (coding, string, 0, 0, XSTRING (string)->size,  \
+  (encode_coding_object (coding, string, 0, 0, SCHARS (string),         \
                          STRING_BYTES (XSTRING (string)), Qt),          \
    (coding)->dst_object)