--- a/image/src/Decoder.cpp
+++ b/image/src/Decoder.cpp
@@ -116,18 +116,18 @@ Decoder::Finish(RasterImage::eShutdownIn
                          "Image", mImage.InnerWindowID()
                        ))) {
         consoleService->LogMessage(errorObject);
       }
     }
 
     bool usable = true;
     if (aShutdownIntent != RasterImage::eShutdownIntent_NotNeeded && !HasDecoderError()) {
-      // If we only have a data error, we're usable if we have at least one frame.
-      if (mImage.GetNumFrames() == 0) {
+      // If we only have a data error, we're usable if we have at least one complete frame.
+      if (GetCompleteFrameCount() == 0) {
         usable = false;
       }
     }
 
     // If we're usable, do exactly what we should have when the decoder
     // completed.
     if (usable) {
       PostDecodeDone();