diff --git a/src/interpreter.cpp b/src/interpreter.cpp
index 85833f1..cd84983 100644
--- a/src/interpreter.cpp
+++ b/src/interpreter.cpp
@@ -259,7 +259,7 @@
 
 private:
     template <typename PathType>
-    ReturnType impl(const PathType& suffix) const
+    [[nodiscard]] ReturnType impl(const PathType& suffix) const
     {
         PathType res = [this] {
             if constexpr (std::is_same<PathType, schemaPath_>()) {