diff --git a/receiver_estimated_maximum_bitrate.go b/receiver_estimated_maximum_bitrate.go
index 683db1c..fd0015b 100644
--- a/receiver_estimated_maximum_bitrate.go
+++ b/receiver_estimated_maximum_bitrate.go
@@ -268,7 +268,7 @@ func (p *ReceiverEstimatedMaximumBitrate) Header() Header {
 // String prints the REMB packet in a human-readable format.
 func (p *ReceiverEstimatedMaximumBitrate) String() string {
 	// Keep a table of powers to units for fast conversion.
-	bitUnits := []string{"b", "Kb", "Mb", "Gb", "Tb", "Pb", "Eb"}
+	bitUnits := []string{"b", "Kb", "Mb", "Gb", "Tb", "Pb", "Eb", "Zb"}
 
 	// Do some unit conversions because b/s is far too difficult to read.
 	bitrate := p.Bitrate
diff --git a/receiver_estimated_maximum_bitrate_test.go b/receiver_estimated_maximum_bitrate_test.go
index 8f1ec26..36e7cfc 100644
--- a/receiver_estimated_maximum_bitrate_test.go
+++ b/receiver_estimated_maximum_bitrate_test.go
@@ -127,4 +127,6 @@ func TestReceiverEstimatedMaximumBitrateOverflow(t *testing.T) {
 	err = packet.Unmarshal(input)
 	assert.NoError(err)
 	assert.Equal(math.Float32frombits(0x62800000), packet.Bitrate)
+
+	assert.Equal("ReceiverEstimatedMaximumBitrate 0 1.18 Zb/s", packet.String())
 }