diff --git a/include/extra/vtype.h b/include/extra/vtype.h
index 77e6b5a..7f614a5 100644
--- a/include/extra/vtype.h
+++ b/include/extra/vtype.h
@@ -8,4 +8,7 @@
 
 extern const size_t LIBCDSB_VTYPE_SIZES[18];
 
+extern const char* libcdsb_vtype_name(vtype t);
+extern const char* libcdsb_vtype_stringify(const void* value, vtype t);
+
 #endif /* LIBCDSB_EXTRA_VTYPE_H */