diff --git a/sumdb/client.go b/sumdb/client.go
index 965a7e2..1c1b029 100644
--- a/sumdb/client.go
+++ b/sumdb/client.go
@@ -553,6 +553,11 @@
 		wg.Add(1)
 		go func(i int, tile tlog.Tile) {
 			defer wg.Done()
+			defer func() {
+				if e := recover(); e != nil {
+					errs[i] = fmt.Errorf("panic: %v", e)
+				}
+			}()
 			data[i], errs[i] = r.c.readTile(tile)
 		}(i, tile)
 	}