diff --git a/src/jbuild b/src/jbuild
index e4ada02f2..b48b4f4ae 100644
--- a/src/jbuild
+++ b/src/jbuild
@@ -2,7 +2,6 @@
   (name        ppx_let)
   (public_name ppx_let)
   (kind      ppx_rewriter)
-  (flags                (:standard -safe-string))
   (libraries            (base ppxlib))
   (preprocess no_preprocessing)))
 
diff --git a/test/jbuild b/test/jbuild
index c018f5a9c..6bf70a34f 100644
--- a/test/jbuild
+++ b/test/jbuild
@@ -1,6 +1,5 @@
 (executables (
   (names (test))
-  (flags (:standard -safe-string))
   (preprocess (pps (ppx_let ppxlib.runner)))))