diff --git a/src/indent.c b/src/indent.c
index 95fc74e..95bda20 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -1338,6 +1338,8 @@
 		new_cursor_col += (*mb_ptr2len)(ptr + new_cursor_col);
 	    else
 		++new_cursor_col;
+	    if (ptr[new_cursor_col] == NUL)
+		break;
 	    vcol += lbr_chartabsize(ptr, ptr + new_cursor_col, (colnr_T)vcol);
 	}
 	vcol = last_vcol;
diff --git a/src/testdir/test_vartabs.vim b/src/testdir/test_vartabs.vim
index 156233d..d21acfe 100644
--- a/src/testdir/test_vartabs.vim
+++ b/src/testdir/test_vartabs.vim
@@ -442,4 +442,16 @@
   setlocal shiftwidth& vartabstop& tabstop&
 endfunc
 
+func Test_vartabstop_latin1()
+  let save_encoding = &encoding
+  new
+  set encoding=iso8859
+  silent norm :se 
+  set vartabstop=400
+  norm i00	
+  bwipe!
+  let &encoding = save_encoding
+endfunc
+
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 9e21411..6eae5e6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4436,
+/**/
     4435,
 /**/
     4434,