diff --git a/qpcpp.qm b/qpcpp.qm
index 15182ba0..a8ffbb40 100644
--- a/qpcpp.qm
+++ b/qpcpp.qm
@@ -12039,9 +12039,12 @@ return curr;</code>
 //! return with interrupts **disabled**.</documentation>
    <!--${QXK-extern-C::QXK_contextSw::next}-->
    <parameter name="next" type="QP::QActive * const"/>
-   <code>std::uint8_t const prev_prio = (QXK_attr_.prev != nullptr)
+   <code>#ifdef Q_SPY
+std::uint8_t const prev_prio = (QXK_attr_.prev != nullptr)
                          ? QXK_attr_.prev-&gt;m_prio
                          : 0U;
+#endif // Q_SPY
+
 std::uint8_t const next_prio = (next != nullptr)
                          ? next-&gt;m_prio
                          : QXK_attr_.actPrio;
diff --git a/src/qxk/qxk.cpp b/src/qxk/qxk.cpp
index 210c2526..8f9bf193 100644
--- a/src/qxk/qxk.cpp
+++ b/src/qxk/qxk.cpp
@@ -453,9 +453,12 @@ QP::QActive * QXK_current() noexcept {
 //${QXK-extern-C::QXK_contextSw} .............................................
 #if defined(Q_SPY) || defined(QXK_ON_CONTEXT_SW)
 void QXK_contextSw(QP::QActive * const next) {
+    #ifdef Q_SPY
     std::uint8_t const prev_prio = (QXK_attr_.prev != nullptr)
                              ? QXK_attr_.prev->m_prio
                              : 0U;
+    #endif // Q_SPY
+
     std::uint8_t const next_prio = (next != nullptr)
                              ? next->m_prio
                              : QXK_attr_.actPrio;