diff --git a/taglib/mpeg/id3v2/id3v2frame.cpp b/taglib/mpeg/id3v2/id3v2frame.cpp
index fc090fef..10882f48 100644
--- a/taglib/mpeg/id3v2/id3v2frame.cpp
+++ b/taglib/mpeg/id3v2/id3v2frame.cpp
@@ -163,7 +163,7 @@ ByteVector Frame::fieldData(const ByteVector &frameData) const
   uint frameDataLength = size();
 
   if(d->header->compression() || d->header->dataLengthIndicator()) {
-    frameDataLength = frameData.mid(headerSize, 4).toUInt();
+    frameDataLength = SynchData::toUInt(frameData.mid(headerSize, 4);
     frameDataOffset += 4;
   }