diff --git a/lib/dom_html.ml b/lib/dom_html.ml
index a9b4d2ce5b..32d3dc03a0 100644
--- a/lib/dom_html.ml
+++ b/lib/dom_html.ml
@@ -288,9 +288,9 @@ end
 
 and storageEvent = object
   inherit event
-  method key : js_string t readonly_prop
+  method key : js_string t opt readonly_prop
   method oldValue : js_string t opt readonly_prop
-  method keynewValue : js_string t opt readonly_prop
+  method newValue : js_string t opt readonly_prop
   method url : js_string t readonly_prop
   method storageArea : storage t opt readonly_prop
 end
diff --git a/lib/dom_html.mli b/lib/dom_html.mli
index 38e659acff..afe4dea765 100644
--- a/lib/dom_html.mli
+++ b/lib/dom_html.mli
@@ -297,9 +297,9 @@ end
 
 and storageEvent = object
   inherit event
-  method key : js_string t readonly_prop
+  method key : js_string t opt readonly_prop
   method oldValue : js_string t opt readonly_prop
-  method keynewValue : js_string t opt readonly_prop
+  method newValue : js_string t opt readonly_prop
   method url : js_string t readonly_prop
   method storageArea : storage t opt readonly_prop
 end