diff --git a/src/ast_values.hpp b/src/ast_values.hpp
index 350fc8d..44e98af 100644
--- a/src/ast_values.hpp
+++ b/src/ast_values.hpp
@@ -43,6 +43,12 @@
                                   identityRef_,
                                   double,
                                   bool,
+                                  int8_t,
+                                  uint8_t,
+                                  int16_t,
+                                  uint16_t,
                                   int32_t,
                                   uint32_t,
+                                  int64_t,
+                                  uint64_t,
                                   std::string>;