1 files changed, 2 insertions, 1 deletions
diff --git a/ws.c b/ws.c
index d7b8c33f14..b282e8c100 100644
--- a/ws.c
+++ b/ws.c
@@ -362,12 +362,13 @@ void ws_fix_copy(struct strbuf *dst, const char *src, int len, unsigned ws_rule,
 		fixed = 1;
 	} else if ((ws_rule & WS_TAB_IN_INDENT) && last_tab_in_indent >= 0) {
 		/* Expand tabs into spaces */
+		int start = dst->len;
 		int last = last_tab_in_indent + 1;
 		for (i = 0; i < last; i++) {
 			if (src[i] == '\t')
 				do {
 					strbuf_addch(dst, ' ');
-				} while (dst->len % 8);
+				} while ((dst->len - start) % 8);
 			else
 				strbuf_addch(dst, src[i]);
 		}