diff --git a/dashboard/app/build/update.go b/dashboard/app/build/update.go
index 5810c6f6..c276a6a3 100644
--- a/dashboard/app/build/update.go
+++ b/dashboard/app/build/update.go
@@ -58,6 +58,7 @@ func updateBenchmark(w http.ResponseWriter, r *http.Request) {
 				continue
 			}
 			com.NeedsBenchmarking = true
+			com.ResultData = nil
 			if err := putCommit(c, com); err != nil {
 				return err
 			}