1 files changed, 1 insertions, 1 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 234ab3ea9c7..0293fce6544 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -540,7 +540,7 @@ extern Lisp_Object make_number ();
 #define SREF(string, index)     XSTRING (string)->data[index]
 #define SDATA(string)           XSTRING (string)->data
 #define SCHARS(string)          XSTRING (string)->size
-#define SBYTES(string)          XSTRING (string)->size_bytes
+#define SBYTES(string)          STRING_BYTES (XSTRING (string))
 #define SMBP(string)            STRING_MULTIBYTE (string)