diff --git a/gen/typinf.cpp b/gen/typinf.cpp
index 07b5917d..60c6e895 100644
--- a/gen/typinf.cpp
+++ b/gen/typinf.cpp
@@ -258,7 +258,8 @@ int TypeDArray::builtinTypeInfo()
 {
     return !mod && ((next->isTypeBasic() != NULL && !next->mod) ||
         // strings are so common, make them builtin
-        (next->ty == Tchar && next->mod == MODimmutable));
+        (next->ty == Tchar && next->mod == MODimmutable) ||
+        (next->ty == Tchar && next->mod == MODconst));
 }
 
 int TypeClass::builtinTypeInfo()