diff --git a/src/common/QskAspect.h b/src/common/QskAspect.h
index 2fc0d43e..58a2faa1 100644
--- a/src/common/QskAspect.h
+++ b/src/common/QskAspect.h
@@ -180,6 +180,7 @@ namespace QskAspect
         constexpr State state() const noexcept;
         State topState() const noexcept;
 
+        void setState( State ) noexcept;
         void addState( State ) noexcept;
         void clearState( State ) noexcept;
         void clearStates() noexcept;
@@ -364,6 +365,11 @@ namespace QskAspect
         return static_cast< State >( m_bits.states );
     }
 
+    inline void Aspect::setState( State state ) noexcept
+    {
+        m_bits.states = state;
+    }
+
     inline void Aspect::addState( State state ) noexcept
     {
         m_bits.states |= state;