diff --git a/src/indent.c b/src/indent.c
index 0d6fadb..4ba31d2 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -1021,7 +1021,21 @@
 		    if (wp->w_briopt_list > 0)
 			prev_list = wp->w_briopt_list;
 		    else
-			prev_indent = (*regmatch.endp - *regmatch.startp);
+		    {
+			char_u	*ptr = *regmatch.startp;
+			char_u	*end_ptr = *regmatch.endp;
+			int	indent = 0;
+
+			// Compute the width of the matched text.
+			// Use win_chartabsize() so that TAB size is correct,
+			// while wrapping is ignored.
+			while (ptr < end_ptr)
+			{
+			    indent += win_chartabsize(wp, ptr, indent);
+			    MB_PTR_ADV(ptr);
+			}
+			prev_indent = indent;
+		    }
 		}
 		vim_regfree(regmatch.regprog);
 	    }