diff --git a/src/misc1.c b/src/misc1.c
index 00a549d..692d5c7 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -2322,7 +2322,7 @@
 	for (i = 0; i < len; i += n)
 	{
 	    if (enc_utf8)
-		/* avoid reading past p[len] */
+		// avoid reading past p[len]
 		n = utfc_ptr2len_len(p + i, len - i);
 	    else
 		n = (*mb_ptr2len)(p + i);
@@ -2365,12 +2365,12 @@
 ins_char_bytes(char_u *buf, int charlen)
 {
     int		c = buf[0];
-    int		newlen;		/* nr of bytes inserted */
-    int		oldlen;		/* nr of bytes deleted (0 when not replacing) */
+    int		newlen;		// nr of bytes inserted
+    int		oldlen;		// nr of bytes deleted (0 when not replacing)
     char_u	*p;
     char_u	*newp;
     char_u	*oldp;
-    int		linelen;	/* length of old line including NUL */
+    int		linelen;	// length of old line including NUL
     colnr_T	col;
     linenr_T	lnum = curwin->w_cursor.lnum;
     int		i;
@@ -2439,8 +2439,7 @@
 	    }
 	    curwin->w_p_list = old_list;
 	}
-	else
-	    if (oldp[col] != NUL)
+	else if (oldp[col] != NUL)
 	{
 	    /* normal replace */
 #ifdef FEAT_MBYTE
@@ -2494,11 +2493,11 @@
     while (i < newlen)
 	p[i++] = ' ';
 
-    /* Replace the line in the buffer. */
+    // Replace the line in the buffer.
     ml_replace(lnum, newp, FALSE);
 
-    /* mark the buffer as changed and prepare for displaying */
-    changed_bytes(lnum, col);
+    // mark the buffer as changed and prepare for displaying
+    inserted_bytes(lnum, col, newlen - oldlen);
 
     /*
      * If we're in Insert or Replace mode and 'showmatch' is set, then briefly
@@ -2566,7 +2565,7 @@
     mch_memmove(newp + col, s, (size_t)newlen);
     mch_memmove(newp + col + newlen, oldp + col, (size_t)(oldlen - col + 1));
     ml_replace(lnum, newp, FALSE);
-    changed_bytes(lnum, col);
+    inserted_bytes(lnum, col, newlen);
     curwin->w_cursor.col += newlen;
 }
 
@@ -3016,6 +3015,21 @@
 #endif
 }
 
+/*
+ * Like changed_bytes() but also adjust text properties for "added" bytes.
+ * When "added" is negative text was deleted.
+ */
+    void
+inserted_bytes(linenr_T lnum, colnr_T col, int added)
+{
+    changed_bytes(lnum, col);
+
+#ifdef FEAT_TEXT_PROP
+    if (curbuf->b_has_textprop && added != 0)
+	adjust_prop_columns(lnum, col, added);
+#endif
+}
+
     static void
 changedOneline(buf_T *buf, linenr_T lnum)
 {
diff --git a/src/proto/misc1.pro b/src/proto/misc1.pro
index 58c3d3f..4a903d2 100644
--- a/src/proto/misc1.pro
+++ b/src/proto/misc1.pro
@@ -35,6 +35,7 @@
 void changed(void);
 void changed_int(void);
 void changed_bytes(linenr_T lnum, colnr_T col);
+void inserted_bytes(linenr_T lnum, colnr_T col, int added);
 void appended_lines(linenr_T lnum, long count);
 void appended_lines_mark(linenr_T lnum, long count);
 void deleted_lines(linenr_T lnum, long count);
diff --git a/src/testdir/dumps/Test_textprop_01.dump b/src/testdir/dumps/Test_textprop_01.dump
index f78c447..98130a7 100644
--- a/src/testdir/dumps/Test_textprop_01.dump
+++ b/src/testdir/dumps/Test_textprop_01.dump
@@ -1,6 +1,6 @@
-| +0#af5f00255#ffffff0@1|1| >O+0#0000000&|n|e| +0&#ffff4012|t|w|o| +0&#ffffff0@63
+| +0#af5f00255#ffffff0@1|1| |O+0#0000000&|n|e| +0&#ffff4012|t|w|o| +0&#ffffff0@63
 | +0#af5f00255&@1|2| |N+0#0000000#ffff4012|u|m|b|é|r| |1+0#4040ff13&|2|3| +0#0000000&|ä|n|d| |t|h|œ|n| |4+0#4040ff13&|¾|7|.+0#0000000&| +0&#ffffff0@46
-| +0#af5f00255&@1|3| |T+0#0000000#ffff4012|h|r+0&#ffffff0|e@1| @65
+| +0#af5f00255&@1|3| |-+0#0000000#ffff4012@1|x+0&#ffffff0|a+0#4040ff13&@1|x+0#0000000&|-@1|x+0#4040ff13&|b@1|x+0#0000000&|-@1|x|c+0#4040ff13&@1|x|-+0#0000000&@1|x+0#4040ff13&|d@1>x|-+0#0000000&@1| @44
 |~+0#4040ff13&| @73
 |~| @73
-| +0#0000000&@56|1|,|1| @10|A|l@1| 
+| +0#0000000&@56|3|,|2|4| @9|A|l@1| 
diff --git a/src/testdir/test_textprop.vim b/src/testdir/test_textprop.vim
index fdf6045..d810dfc 100644
--- a/src/testdir/test_textprop.vim
+++ b/src/testdir/test_textprop.vim
@@ -300,17 +300,25 @@
     return
   endif
   call writefile([
-	\ "call setline(1, ['One two', 'Numbér 123 änd thœn 4¾7.', 'Three'])",
+	\ "call setline(1, ['One two', 'Numbér 123 änd thœn 4¾7.', '--aa--bb--cc--dd--'])",
 	\ "hi NumberProp ctermfg=blue",
 	\ "hi LongProp ctermbg=yellow",
 	\ "call prop_type_add('number', {'highlight': 'NumberProp'})",
 	\ "call prop_type_add('long', {'highlight': 'LongProp'})",
+	\ "call prop_type_add('start', {'highlight': 'NumberProp', 'start_incl': 1})",
+	\ "call prop_type_add('end', {'highlight': 'NumberProp', 'end_incl': 1})",
+	\ "call prop_type_add('both', {'highlight': 'NumberProp', 'start_incl': 1, 'end_incl': 1})",
 	\ "call prop_add(1, 4, {'end_lnum': 3, 'end_col': 3, 'type': 'long'})",
 	\ "call prop_add(2, 9, {'length': 3, 'type': 'number'})",
 	\ "call prop_add(2, 24, {'length': 4, 'type': 'number'})",
+	\ "call prop_add(3, 3, {'length': 2, 'type': 'number'})",
+	\ "call prop_add(3, 7, {'length': 2, 'type': 'start'})",
+	\ "call prop_add(3, 11, {'length': 2, 'type': 'end'})",
+	\ "call prop_add(3, 15, {'length': 2, 'type': 'both'})",
 	\ "set number",
 	\ "hi clear SpellBad",
 	\ "set spell",
+	\ "normal 3G0llix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>",
 	\], 'XtestProp')
   let buf = RunVimInTerminal('-S XtestProp', {'rows': 6})
   call VerifyScreenDump(buf, 'Test_textprop_01', {})
diff --git a/src/textprop.c b/src/textprop.c
index ce6b66c..526a6f0 100644
--- a/src/textprop.c
+++ b/src/textprop.c
@@ -915,11 +915,47 @@
 /*
  * Adjust the columns of text properties in line "lnum" after position "col" to
  * shift by "bytes_added" (can be negative).
+ * Note that "col" is zero-based, while tp_col is one-based.
+ * Only for the current buffer.
+ * Called is expected to check b_has_textprop and "bytes_added" being non-zero.
  */
     void
-adjust_prop_columns(linenr_T lnum UNUSED, colnr_T col UNUSED, int bytes_added UNUSED)
+adjust_prop_columns(linenr_T lnum, colnr_T col, int bytes_added)
 {
-    // TODO
+    int		proplen;
+    char_u	*props;
+    textprop_T	tmp_prop;
+    proptype_T  *pt;
+    int		dirty = FALSE;
+    int		i;
+
+    proplen = get_text_props(curbuf, lnum, &props, TRUE);
+    if (proplen == 0)
+	return;
+
+    for (i = 0; i < proplen; ++i)
+    {
+	mch_memmove(&tmp_prop, props + i * sizeof(textprop_T),
+							   sizeof(textprop_T));
+	pt = text_prop_type_by_id(curbuf, tmp_prop.tp_type);
+
+	if (tmp_prop.tp_col >= col + (pt != NULL && (pt->pt_flags & PT_FLAG_INS_START_INCL) ? 2 : 1))
+	{
+	    tmp_prop.tp_col += bytes_added;
+	    dirty = TRUE;
+	}
+	else if (tmp_prop.tp_col + tmp_prop.tp_len > col + (pt != NULL && (pt->pt_flags & PT_FLAG_INS_END_INCL) ? 0 : 1))
+	{
+	    tmp_prop.tp_len += bytes_added;
+	    dirty = TRUE;
+	}
+	if (dirty)
+	{
+	    curbuf->b_ml.ml_flags |= ML_LINE_DIRTY;
+	    mch_memmove(props + i * sizeof(textprop_T), &tmp_prop,
+							   sizeof(textprop_T));
+	}
+    }
 }
 
 #endif // FEAT_TEXT_PROP
diff --git a/src/version.c b/src/version.c
index 439e1bc..fbd6110 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    678,
+/**/
     677,
 /**/
     676,