diff --git a/async.c b/async.c
index 6caa98cd92..0e0efc340a 100644
--- a/async.c
+++ b/async.c
@@ -218,7 +218,7 @@ aio_ctx_check(GSource *source)
     for (bh = ctx->first_bh; bh; bh = bh->next) {
         if (!bh->deleted && bh->scheduled) {
             return true;
-	}
+        }
     }
     return aio_pending(ctx) || (timerlistgroup_deadline_ns(&ctx->tlg) == 0);
 }