diff --git a/src/internal/NeoEsp8266DmaMethod.h b/src/internal/NeoEsp8266DmaMethod.h
index d6ab582..3dabcfd 100644
--- a/src/internal/NeoEsp8266DmaMethod.h
+++ b/src/internal/NeoEsp8266DmaMethod.h
@@ -168,7 +168,7 @@ public:
         free(_i2sBufDesc);
     }
 
-    bool IsReadyToUpdate() 
+    bool IsReadyToUpdate() const
     {
         return (_dmaState == NeoDmaState_Idle);
     }
@@ -444,4 +444,4 @@ typedef NeoEsp8266DmaSk6812Method NeoLc8812Method;
 typedef NeoEsp8266DmaWs2812xMethod Neo800KbpsMethod;
 typedef NeoEsp8266Dma400KbpsMethod Neo400KbpsMethod;
 
-#endif
\ No newline at end of file
+#endif