diff --git a/taglib/riff/aiff/aiffproperties.cpp b/taglib/riff/aiff/aiffproperties.cpp
index 9da5b1d8..77c3d277 100644
--- a/taglib/riff/aiff/aiffproperties.cpp
+++ b/taglib/riff/aiff/aiffproperties.cpp
@@ -148,6 +148,6 @@ void RIFF::AIFF::Properties::read(const ByteVector &data)
   d->sampleWidth    = data.mid(6, 2).toShort();
   double sampleRate = ConvertFromIeeeExtended(reinterpret_cast<unsigned char *>(data.mid(8, 10).data()));
   d->sampleRate     = sampleRate;
-  d->bitrate        = (sampleRate * d->sampleWidth * d->channels) / 1024.0;
+  d->bitrate        = (sampleRate * d->sampleWidth * d->channels) / 1000.0;
   d->length         = sampleFrames / d->sampleRate;
 }
diff --git a/taglib/riff/wav/wavproperties.cpp b/taglib/riff/wav/wavproperties.cpp
index 07971a06..37216860 100644
--- a/taglib/riff/wav/wavproperties.cpp
+++ b/taglib/riff/wav/wavproperties.cpp
@@ -114,7 +114,7 @@ void RIFF::WAV::Properties::read(const ByteVector &data)
   d->sampleWidth = data.mid(14, 2).toShort(false);
 
   uint byteRate = data.mid(8, 4).toUInt(false);
-  d->bitrate = byteRate * 8 / 1024;
+  d->bitrate = byteRate * 8 / 1000;
 
   d->length = byteRate > 0 ? d->streamLength / byteRate : 0;
 }