diff --git a/svg/global_attributes.json b/svg/global_attributes.json
index f69232e6609627..12563b0de1bbed 100644
--- a/svg/global_attributes.json
+++ b/svg/global_attributes.json
@@ -184,7 +184,7 @@
           "spec_url": "https://svgwg.org/svg2-draft/struct.html#WhitespaceProcessingXMLSpaceAttribute",
           "support": {
             "chrome": {
-              "version_added": null
+              "version_added": "6"
             },
             "chrome_android": "mirror",
             "edge": "mirror",
@@ -199,7 +199,7 @@
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
-              "version_added": null
+              "version_added": "5"
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",