rice/String.hpp in rice-1.5.1 vs rice/String.hpp in rice-1.5.2

@@ -83,7 +83,9 @@
 Rice::Object to_ruby<Rice::String>(Rice::String const & x)
 {
   return x;
 }
 
+#include "Builtin_Object.ipp"
+
 #endif // Rice__String__hpp_