diff --git a/src/MariaResultImpl.h b/src/MariaResultImpl.h
index d1c45f44..4eb366cc 100644
--- a/src/MariaResultImpl.h
+++ b/src/MariaResultImpl.h
@@ -14,7 +14,7 @@ class MariaResultImpl {
 
   virtual cpp11::writable::list get_column_info() = 0;
 
-  virtual List fetch(int n_max = -1) = 0;
+  virtual cpp11::list fetch(int n_max = -1) = 0;
 
   virtual int n_rows_affected() = 0;
   virtual int n_rows_fetched() = 0;