diff --git a/src/DbColumnStorage.h b/src/DbColumnStorage.h
index f386c72c0..2f786d603 100644
--- a/src/DbColumnStorage.h
+++ b/src/DbColumnStorage.h
@@ -27,7 +27,7 @@ class DbColumnStorage {
   int copy_to(SEXP x, DATA_TYPE dt, const int pos) const;
 
   // allocate()
-  static SEXPTYPE sexptype_from_datatype(DATA_TYPE type);
+  static SEXPTYPE sexptype_from_datatype(DATA_TYPE dt);
 
 private:
   // append_col()