diff --git a/gf256/gf256.go b/gf256/gf256.go
index <HASH>..<HASH> 100644
--- a/gf256/gf256.go
+++ b/gf256/gf256.go
@@ -109,7 +109,7 @@ func (f *Field) Add(x, y byte) byte {
 	return x ^ y
 }
 
-// Exp returns the the base-α exponential of e in the field.
+// Exp returns the base-α exponential of e in the field.
 // If e < 0, Exp returns 0.
 func (f *Field) Exp(e int) byte {
 	if e < 0 {
gf<I>: fix "the the" in doc comment