diff --git a/src/libs/vpatterndb/vformula.cpp b/src/libs/vpatterndb/vformula.cpp
index 5a764c7d7..301d331e7 100644
--- a/src/libs/vpatterndb/vformula.cpp
+++ b/src/libs/vpatterndb/vformula.cpp
@@ -32,6 +32,7 @@
 #include <QMessageLogger>
 #include <QScopedPointer>
 #include <QtDebug>
+#include <limits>
 
 #include "../qmuparser/qmuparsererror.h"
 #include "../vmisc/def.h"
@@ -273,6 +274,6 @@ void VFormula::ResetState()
 {
     d->strValue = tr("Error");
     d->error = true;
-    d->dValue = NAN;
+    d->dValue = std::numeric_limits<qreal>::quiet_NaN();
     d->reason = tr("Not evaluated");
 }
diff --git a/src/libs/vpatterndb/vformula_p.h b/src/libs/vpatterndb/vformula_p.h
index ef4d3be1a..54408bbf4 100644
--- a/src/libs/vpatterndb/vformula_p.h
+++ b/src/libs/vpatterndb/vformula_p.h
@@ -30,6 +30,7 @@
 
 #include <QCoreApplication>
 #include <QSharedData>
+#include <limits>
 
 #if QT_VERSION < QT_VERSION_CHECK(5, 5, 0)
 #include "../vmisc/diagnostic.h"
@@ -53,16 +54,16 @@ public:
     VFormulaData(const VFormulaData &formula) = default;
     ~VFormulaData() = default;
 
-    QString formula{};                      // NOLINT(misc-non-private-member-variables-in-classes)
-    QString strValue{tr("Error")};          // NOLINT(misc-non-private-member-variables-in-classes)
-    bool checkZero{true};                   // NOLINT(misc-non-private-member-variables-in-classes)
-    bool checkLessThanZero{false};          // NOLINT(misc-non-private-member-variables-in-classes)
-    const VContainer *data{nullptr};        // NOLINT(misc-non-private-member-variables-in-classes)
-    quint32 toolId{NULL_ID};                // NOLINT(misc-non-private-member-variables-in-classes)
-    QString postfix{};                      // NOLINT(misc-non-private-member-variables-in-classes)
-    bool error{true};                       // NOLINT(misc-non-private-member-variables-in-classes)
-    qreal dValue{NAN};                      // NOLINT(misc-non-private-member-variables-in-classes)
-    QString reason{tr("Formula is empty")}; // NOLINT(misc-non-private-member-variables-in-classes)
+    QString formula{};                                     // NOLINT(misc-non-private-member-variables-in-classes)
+    QString strValue{tr("Error")};                         // NOLINT(misc-non-private-member-variables-in-classes)
+    bool checkZero{true};                                  // NOLINT(misc-non-private-member-variables-in-classes)
+    bool checkLessThanZero{false};                         // NOLINT(misc-non-private-member-variables-in-classes)
+    const VContainer *data{nullptr};                       // NOLINT(misc-non-private-member-variables-in-classes)
+    quint32 toolId{NULL_ID};                               // NOLINT(misc-non-private-member-variables-in-classes)
+    QString postfix{};                                     // NOLINT(misc-non-private-member-variables-in-classes)
+    bool error{true};                                      // NOLINT(misc-non-private-member-variables-in-classes)
+    qreal dValue{std::numeric_limits<qreal>::quiet_NaN()}; // NOLINT(misc-non-private-member-variables-in-classes)
+    QString reason{tr("Formula is empty")};                // NOLINT(misc-non-private-member-variables-in-classes)
 
 private:
     Q_DISABLE_ASSIGN_MOVE(VFormulaData) // NOLINT