diff --git a/extract.c b/extract.c
index 8ae0489a..5b5b5ebc 100644
--- a/extract.c
+++ b/extract.c
@@ -390,6 +390,10 @@ add_rich_diff(struct extraction_context *ctx, struct attributes attrs, const str
                 ctx->buf[ctx->idx++] = U'4';
                 ctx->buf[ctx->idx++] = U':';
                 ctx->buf[ctx->idx++] = U'1';
+
+                ctx->underline_style = 0;
+                ctx->un = 0;
+                ctx->un_src = 0;
             }
         } else {
             if (!init_x1b(&x1b, ctx))