diff --git a/tape/decode.go b/tape/decode.go
index 990418b..9a2ad58 100644
--- a/tape/decode.go
+++ b/tape/decode.go
@@ -110,23 +110,6 @@ func (this *Decoder) ReadUintN(bytes int) (value uint64, n int, err error) {
 	return value, n, nil
 }
 
-// ReadGBEU decodes a growing unsigned integer of up to 64 bits from the input
-// reader.
-func (this *Decoder) ReadGBEU() (value uint64, n int, err error) {
-	var fullValue uint64
-	for {
-		chunk, nn, err := this.ReadByte()
-		n += nn; if err != nil { return 0, n, err }
-		
-		fullValue *= 0x80
-		fullValue += uint64(chunk & 0x7F)
-		ccb := chunk >> 7
-		if ccb == 0 {
-			return fullValue, n, nil
-		}
-	}
-}
-
 // ReadFloat32 decldes a 32-bit floating point value from the input reader.
 func (this *Decoder) ReadFloat32() (value float32, n int, err error) {
 	bits, nn, err := this.ReadUint32()
diff --git a/tape/encode.go b/tape/encode.go
index 878697a..8d225f0 100644
--- a/tape/encode.go
+++ b/tape/encode.go
@@ -99,27 +99,6 @@ func (this *Encoder) WriteUintN(value uint64, bytes int) (n int, err error) {
 	return n, nil
 }
 
-// EncodeGBEU encodes a growing unsigned integer of up to 64 bits to the output
-// writer.
-func (this *Encoder) EncodeGBEU(value uint64) (n int, err error) {
-	buffer := [16]byte { }
-	
-	window := (GBEUSize(value) - 1) * 7
-	index := 0
-	for window >= 0 {
-		chunk := uint8(value >> window) & 0x7F
-		if window > 0 {
-			chunk |= 0x80
-		}
-		buffer[index] = chunk
-		
-		index += 1
-		window -= 7
-	}
-	
-	return this.Write(buffer[:])
-}
-
 // WriteFloat32 encodes a 32-bit floating point value to the output writer.
 func (this *Encoder) WriteFloat32(value float32) (n int, err error) {
 	return this.WriteUint32(math.Float32bits(value))
diff --git a/tape/measure.go b/tape/measure.go
index ded5153..b57fd9d 100644
--- a/tape/measure.go
+++ b/tape/measure.go
@@ -1,15 +1,5 @@
 package tape
 
-// GBEUSize returns the size (in octets) of a GBEU integer.
-func GBEUSize(value uint64) int {
-	length := 0
-	for {
-		value >>= 7
-		length ++
-		if value == 0 { return length }
-	}
-}
-
 // IntBytes returns the number of bytes required to hold a given unsigned
 // integer.
 func IntBytes(value uint64) int {