1 files changed, 4 insertions, 3 deletions

diff --git a/src/coding.c b/src/coding.c
index 93726169585..8bac5c5ae80 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -999,7 +999,7 @@ coding_set_destination (coding)
     {
       if (coding->src_pos < 0)
         {
-          coding->destination = BEG_ADDR + coding->dst_pos_byte - 1;
+          coding->destination = BEG_ADDR + coding->dst_pos_byte - BEG_BYTE;
           coding->dst_bytes = (GAP_END_ADDR
                                - (coding->src_bytes - coding->consumed)
                                - coding->destination);
@@ -1009,7 +1009,7 @@ coding_set_destination (coding)
           /* We are sure that coding->dst_pos_byte is before the gap
              of the buffer. */
           coding->destination = (BUF_BEG_ADDR (XBUFFER (coding->dst_object))
-                                 + coding->dst_pos_byte - 1);
+                                 + coding->dst_pos_byte - BEG_BYTE);
           coding->dst_bytes = (BUF_GAP_END_ADDR (XBUFFER (coding->dst_object))
                                - coding->destination);
         }
@@ -7329,7 +7329,8 @@ Lisp_Object
 detect_coding_system (src, src_chars, src_bytes, highest, multibytep,
                       coding_system)
      const unsigned char *src;
-     int src_chars, src_bytes, highest;
+     EMACS_INT src_chars, src_bytes;
+     int highest;
      int multibytep;
      Lisp_Object coding_system;
 {