diff --git a/src/phrases/datephrase.h b/src/phrases/datephrase.h
index d37e18a..bcb55a9 100644
--- a/src/phrases/datephrase.h
+++ b/src/phrases/datephrase.h
@@ -77,6 +77,8 @@ public:
                                  QVariantList() << min << max);
     }
 
+    template<class P = T,
+             class std::enable_if<std::is_same<P, QDateTime>::value, int>::type = 0>
     ConditionalPhrase addYears(int val) {
         if (!is_valid_template<T, QDate>())
             return ConditionalPhrase();