diff --git a/include/core/minoptmax.h b/include/core/minoptmax.h
index e687fed4d8..dc65eeb259 100644
--- a/include/core/minoptmax.h
+++ b/include/core/minoptmax.h
@@ -45,7 +45,7 @@ public:
     bool IsNull() const { return m_isNull; }
 
 private:
-    bool m_isNull;
+    bool m_isNull = true;
     T    m_min{};
     T    m_opt{};
     T    m_max{};