diff --git a/taglib/mp4/mp4properties.cpp b/taglib/mp4/mp4properties.cpp
index df83d641..c932ed0d 100644
--- a/taglib/mp4/mp4properties.cpp
+++ b/taglib/mp4/mp4properties.cpp
@@ -224,7 +224,7 @@ MP4::Properties::read(File *file, const Atoms *atoms)
         pos += 10;
         if(const unsigned int bitrateValue = data.toUInt(pos);
            bitrateValue != 0 || d->length <= 0) {
-          d->bitrate = static_cast<int>((bitrateValue + 500) / 1000.0 + 0.5);
+          d->bitrate = static_cast<int>(bitrateValue / 1000.0 + 0.5);
         }
         else {
           d->bitrate = static_cast<int>(
diff --git a/taglib/mpeg/mpegheader.cpp b/taglib/mpeg/mpegheader.cpp
index c20b89d3..084a3486 100644
--- a/taglib/mpeg/mpegheader.cpp
+++ b/taglib/mpeg/mpegheader.cpp
@@ -239,7 +239,7 @@ void MPEG::Header::parse(File *file, offset_t offset, bool checkLength)
                        (static_cast<unsigned char>(frameLengthData[0]) << 3) |
                        (static_cast<unsigned char>(frameLengthData[1]) >> 5);
 
-      d->bitrate = static_cast<int>(d->frameLength * d->sampleRate / 1024.0 + 0.5) * 8 / 1024;
+      d->bitrate = static_cast<int>(d->frameLength * d->sampleRate / 1024.0 + 0.5) * 8 / 1000;
     }
   }
   else {