diff --git a/src/parser.c b/src/parser.c
index e9d2fcba..a9b6eb5e 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -192,12 +192,14 @@ static const ReplacementEntry kSvgAttributeReplacements[] = {
   REPLACEMENT_ENTRY("baseprofile", "baseProfile"),
   REPLACEMENT_ENTRY("calcmode", "calcMode"),
   REPLACEMENT_ENTRY("clippathunits", "clipPathUnits"),
-  // REPLACEMENT_ENTRY("contentscripttype", "contentScriptType"),
-  // REPLACEMENT_ENTRY("contentstyletype", "contentStyleType"),
+#ifndef GUMBO_HTML5_TIP
+  REPLACEMENT_ENTRY("contentscripttype", "contentScriptType"),
+  REPLACEMENT_ENTRY("contentstyletype", "contentStyleType"),
+  REPLACEMENT_ENTRY("externalresourcesrequired", "externalResourcesRequired"),
+  REPLACEMENT_ENTRY("filterres", "filterRes"),
+#endif
   REPLACEMENT_ENTRY("diffuseconstant", "diffuseConstant"),
   REPLACEMENT_ENTRY("edgemode", "edgeMode"),
-  // REPLACEMENT_ENTRY("externalresourcesrequired", "externalResourcesRequired"),
-  // REPLACEMENT_ENTRY("filterres", "filterRes"),
   REPLACEMENT_ENTRY("filterunits", "filterUnits"),
   REPLACEMENT_ENTRY("glyphref", "glyphRef"),
   REPLACEMENT_ENTRY("gradienttransform", "gradientTransform"),