diff --git a/src/gui/painting/qcmyk_p.h b/src/gui/painting/qcmyk_p.h
index d00a4b5a6e9..1294a18244e 100644
--- a/src/gui/painting/qcmyk_p.h
+++ b/src/gui/painting/qcmyk_p.h
@@ -24,6 +24,10 @@ class QCmyk32
 {
 private:
     uint m_cmyk = 0;
+    friend constexpr bool comparesEqual(const QCmyk32 &lhs, const QCmyk32 &rhs) noexcept
+    {
+        return lhs.m_cmyk == rhs.m_cmyk;
+    }
 
 public:
     QCmyk32() = default;
@@ -77,6 +81,8 @@ public:
         QColor c = color.toCmyk();
         return QCmyk32(c.cyan(), c.magenta(), c.yellow(), c.black());
     }
+
+    Q_DECLARE_EQUALITY_COMPARABLE_LITERAL_TYPE(QCmyk32)
 };
 
 static_assert(sizeof(QCmyk32) == sizeof(int));