diff --git a/Sources/Image/ImageDrawing.swift b/Sources/Image/ImageDrawing.swift
index 31e890e44..64494316b 100644
--- a/Sources/Image/ImageDrawing.swift
+++ b/Sources/Image/ImageDrawing.swift
@@ -281,7 +281,6 @@ extension KingfisherWrapper where Base: KFCrossPlatformImage {
         
         let w = Int(size.width)
         let h = Int(size.height)
-        let rowBytes = Int(CGFloat(cgImage.bytesPerRow))
         
         func createEffectBuffer(_ context: CGContext) -> vImage_Buffer {
             let data = context.data