diff --git a/SDWebImage/Core/SDImageIOCoder.m b/SDWebImage/Core/SDImageIOCoder.m
index 11565e12..715b0205 100644
--- a/SDWebImage/Core/SDImageIOCoder.m
+++ b/SDWebImage/Core/SDImageIOCoder.m
@@ -277,7 +277,7 @@ static NSString * kSDCGImageDestinationRequestedFileSize = @"kCGImageDestination
     }
     NSUInteger pixelWidth = CGImageGetWidth(imageRef);
     NSUInteger pixelHeight = CGImageGetHeight(imageRef);
-    if (maxPixelSize.width > 0 && maxPixelSize.height > 0 && pixelWidth > 0 && pixelHeight > 0) {
+    if (maxPixelSize.width > 0 && maxPixelSize.height > 0 && pixelWidth > maxPixelSize.width && pixelHeight > maxPixelSize.height) {
         CGFloat pixelRatio = pixelWidth / pixelHeight;
         CGFloat maxPixelSizeRatio = maxPixelSize.width / maxPixelSize.height;
         CGFloat finalPixelSize;