diff --git a/tiny_obj_loader.h b/tiny_obj_loader.h
index 7f52577..d2ec096 100644
--- a/tiny_obj_loader.h
+++ b/tiny_obj_loader.h
@@ -457,8 +457,12 @@ int fd_;
 uint64_t fsize_,pos_;
 size_t buf_sz;
 };
-#endif	
-	
+#endif
+
+
+
+//***************************************************
+//*************** tigro keywords hash functions begin
 	
 //tigra: x31 hash function
 
@@ -616,6 +620,9 @@ int token2tok(const char* token)
 	return a_tok;
 }
 
+//*************** tigro keywords hash functions END
+//*************************************************
+
 	
 	
 MaterialReader::~MaterialReader() {}