--- third_party/instaweb/src/net/instaweb/rewriter/elide_attributes_filter.cc
+++ third_party/instaweb/src/net/instaweb/rewriter/elide_attributes_filter.cc
@@ -82,7 +82,7 @@
 
 const TagAttrValue kDefaultList[] = {
   {"script", "language", NULL},
-  {"script", "type", NULL},
+  {"script", "type", "text/javascript"},
   {"style", "type", NULL},
   {"br", "clear", "none"},
   {"a", "shape", "rect"},