diff --git a/handler/api/repos/builds/retry.go b/handler/api/repos/builds/retry.go
index f89aa2572..dccdf65f0 100644
--- a/handler/api/repos/builds/retry.go
+++ b/handler/api/repos/builds/retry.go
@@ -97,6 +97,9 @@ func HandleRetry(
 			}
 			hook.Params[key] = value[0]
 		}
+		for key, value := range prev.Params {
+			hook.Params[key] = value
+		}
 
 		result, err := triggerer.Trigger(r.Context(), repo, hook)
 		if err != nil {