diff --git a/Userland/Applications/PixelPaint/ImageProcessor.h b/Userland/Applications/PixelPaint/ImageProcessor.h
index 4566aae279..a455677574 100644
--- a/Userland/Applications/PixelPaint/ImageProcessor.h
+++ b/Userland/Applications/PixelPaint/ImageProcessor.h
@@ -61,7 +61,6 @@ public:
 
 private:
     ImageProcessor();
-    void processor_main();
 
     // Only the memory in the queue is in shared memory, i.e. the smart pointers themselves.
     // The actual data will remain in normal memory, but for this application we're not using multiple processes so it's fine.